Download or read book The Effects of High Intensity Interval Training in Conjunction with Functional Training Equipment on VO2max and Peak Power in Recreationally Trained Individuals written by Christopher Sataray and published by . This book was released on 2016 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of High Intensity Interval Training on VO2 Peak and Performance in Trained High School Rowers written by Natasha Carr and published by . This book was released on 2011 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Intensity Interval Training (HIIT) is a phrase quickly becoming popularized through current research due to the physical and physiological success this method of training has proven to yield in both untrained and trained individuals. There is no set definition used to describe HIIT, but it typically refers to repeated bouts of fairly brief intermittent exercise. A great deal of research outlines the benefits associated with utilizing HIIT in untrained and recreationally trained individuals. However, research on the effect HIIT has or could possibly have on the well-trained endurance athlete is limited, specifically in the sport of rowing. The purpose of this study was to analyze the effect of HIIT on VO2 peak and performance in trained rowers when compared to traditional, endurance training. It was hypothesized that HIIT would be just as effective at improving VO2 peak and performance as the endurance training protocol in well-trained rowers. A total of 20 high school female rowers participated in the study (mean ± SD; age = 16 ± 1). Baseline testing was comprised of a 2000m time-trial test on the Concept IIc Rowing Ergometer and a maximal exercise test, which was also completed on the Concept IIc Ergometer, in order to determine VO2 peak. Subjects were randomly assigned to a HIIT or endurance group for four weeks of intervention. Three days/week the HIIT group completed a 6 by 30second repeated Wingate protocol on the Concept II Ergometer at or above 100% VO2 peak, in which each 30s maximal effort was immediately followed by an active recovery of four-minutes. The endurance group completed 30 minutes of sub-maximal rowing at 65% of VO2 peak three days/week. After four weeks of intervention, post-testing took place, which was identical to baseline testing. Results from this study suggest HIIT was just as effective as endurance training at improving 2k time (mean ± SD; HIIT: 498.7 ± 23.1; Endurance: 497.5 ± 17.6). There were no significant within or between group differences in VO2 peak post-intervention (mean ± SD; HIIT: 44.8 ± 4.0; Endurance: 45.8 ± 5.6). The current study suggests four-weeks of HIIT training can yield similar adaptations in performance when compared to endurance training.

Download or read book High Intensity Exercise in Hypoxia Beneficial Aspects and Potential Drawbacks written by Olivier Girard and published by Frontiers Media SA. This book was released on 2018-01-25 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past, ‘traditional’ moderate-intensity continuous training (60-75% peak heart rate) was the type of physical activity most frequently recommended for both athletes and clinical populations (cf. American College of Sports Medicine guidelines). However, growing evidence indicates that high-intensity interval training (80-100% peak heart rate) could actually be associated with larger cardiorespiratory fitness and metabolic function benefits and, thereby, physical performance gains for athletes. Similarly, recent data in obese and hypertensive individuals indicate that various mechanisms – further improvement in endothelial function, reductions in sympathetic neural activity, or in arterial stiffness – might be involved in the larger cardiovascular protective effects associated with training at high exercise intensities. Concerning hypoxic training, similar trends have been observed from ‘traditional’ prolonged altitude sojourns (‘Live High Train High’ or ‘Live High Train Low’), which result in increased hemoglobin mass and blood carrying capacity. Recent innovative ‘Live Low Train High’ methods (‘Resistance Training in Hypoxia’ or ‘Repeated Sprint Training in Hypoxia’) have resulted in peripheral adaptations, such as hypertrophy or delay in muscle fatigue. Other interventions inducing peripheral hypoxia, such as vascular occlusion during endurance/resistance training or remote ischemic preconditioning (i.e. succession of ischemia/reperfusion episodes), have been proposed as methods for improving subsequent exercise performance or altitude tolerance (e.g. reduced severity of acute-mountain sickness symptoms). Postulated mechanisms behind these metabolic, neuro-humoral, hemodynamics, and systemic adaptations include stimulation of nitric oxide synthase, increase in anti-oxidant enzymes, and down-regulation of pro-inflammatory cytokines, although the amount of evidence is not yet significant enough. Improved O2 delivery/utilization conferred by hypoxic training interventions might also be effective in preventing and treating cardiovascular diseases, as well as contributing to improve exercise tolerance and health status of patients. For example, in obese subjects, combining exercise with hypoxic exposure enhances the negative energy balance, which further reduces weight and improves cardio-metabolic health. In hypertensive patients, the larger lowering of blood pressure through the endothelial nitric oxide synthase pathway and the associated compensatory vasodilation is taken to reflect the superiority of exercising in hypoxia compared to normoxia. A hypoxic stimulus, in addition to exercise at high vs. moderate intensity, has the potential to further ameliorate various aspects of the vascular function, as observed in healthy populations. This may have clinical implications for the reduction of cardiovascular risks. Key open questions are therefore of interest for patients suffering from chronic vascular or cellular hypoxia (e.g. work-rest or ischemia/reperfusion intermittent pattern; exercise intensity; hypoxic severity and exposure duration; type of hypoxia (normobaric vs. hypobaric); health risks; magnitude and maintenance of the benefits). Outside any potential beneficial effects of exercising in O2-deprived environments, there may also be long-term adverse consequences of chronic intermittent severe hypoxia. Sleep apnea syndrome, for instance, leads to oxidative stress and the production of reactive oxygen species, and ultimately systemic inflammation. Postulated pathophysiological changes associated with intermittent hypoxic exposure include alteration in baroreflex activity, increase in pulmonary arterial pressure and hematocrit, changes in heart structure and function, and an alteration in endothelial-dependent vasodilation in cerebral and muscular arteries. There is a need to explore the combination of exercising in hypoxia and association of hypertension, developmental defects, neuro-pathological and neuro-cognitive deficits, enhanced susceptibility to oxidative injury, and possibly increased myocardial and cerebral infarction in individuals sensitive to hypoxic stress. The aim of this Research Topic is to shed more light on the transcriptional, vascular, hemodynamics, neuro-humoral, and systemic consequences of training at high intensities under various hypoxic conditions.

Download or read book Maximum Interval Training written by Cissik, John and published by Human Kinetics. This book was released on 2015-05-05 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are you ready to challenge yourself, and turn up the intensity of your workouts? Are you ready for a proven program that burns fat, increases muscle, and sculpts the physique you’ve always wanted? If so, then Maximum Interval Training is for you! Maximum Interval Training combines high-intensity exercises and nontraditional equipment with a variety of modalities and training options to stimulate muscle growth, avoid plateaus, and produce results.

Download or read book Effects of High Intensity Interval Training on Cardiorespiratory Fitness and Body Composition in Women written by Rachel Marie Dykstra and published by . This book was released on 2021 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: A growing body of literature indicates that women, in comparison to men, report significantly more barriers to exercise, often times related to perceived lack of time due to their social roles (e.g. family responsibility, childcare). Therefore, it has been considered that exercise programs that require less time commitments would be more attractive for women to alleviate this concern. Objective: This review was conducted to comprehensively understand the present literature surrounding women and such a time-efficient protocol: high intensity interval training (HIIT). The primary aim was to determine the impact of HIIT on both cardiorespiratory fitness (CRF) and body composition. The secondary aim was to identify what variables, if any, influence the effect of HIIT on changes in CRF and body composition. Methods: A database search was conducted in MEDLINE (PubMed), CENTRAL (Cochrane), and ESCO (SPORTdiscus) to obtain all peer-reviewed publications up until November 2020. Studies were included if HIIT protocols were aerobic-based, a minimum of two weeks in duration, participants were between the ages of 18-65 years and free from cardiovascular, metabolic, or renal disease and cancers. Comparisons were made for changes in maximal or peak oxygen consumption (VO2max or VO2peak), fat mass (FM), fat-free mass (FFM), and body fat percentage (BF%). Results: 41 studies were included in this review, involving a total of 628 female subjects who were predominantly younger (582 subjects between ages 18-35 years) and overweight (body mass index ranging from 20.3-35.7 kg-m-2). Exercise intervention duration ranged from 2-15 weeks (7.8±3.7 weeks), utilizing between 2-5 sessions (3.1±0.4 visits) per week. Of the 37 studies with CRF as an outcome measures, 34 reported improvements. 35 studies reported pre- and post-intervention assessments surrounding body composition. 14 determined significant improvements in BF% and 12 studies reported a significant decrease in FM, six showed significant increases in FFM. Conclusion: It is suggested that HIIT can significantly improve CRF in women, irrespective of age, training status, BMI, and training frequency. However, exercise intervention duration, in conjunction with the appropriate intensity of exercise may influence the improvements. HIIT interventions that are shorter in duration (≤7 week) should consider utilizing intensities >100% VO2max (supramaximal) to elicit improvements in CRF. Intensities ranging from 85-95% VO2max are sufficient to augment CRF in interventions exceeding 7 weeks. The effect of HIIT on body composition is less clear. Excess post-exercise oxygen consumption (EPOC) and energy expenditure greatly exceeding 1000 MET-minutes per week may account for reductions in FM. However, there is no guarantee that these reasons alone account for all reductions in FM. There were improvements in FFM across very few studies (n = 6). It is suggested that aerobic-based HIIT be supplemented with resistance training to generate superior improvements in FFM. Furthermore, lack of controlled diet across all studies makes it difficult to determine if caloric intake could account for any changes in body composition. While HIIT may be an effective and time-efficient protocol for women, future research should focus on ecological validity and women’s adherence to such vigorous training, specifically within non-athletic and sedentary subgroups.

Download or read book The Effects of High Intensity Interval Training on Pulmonary Function written by Cali A. Dunham and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-intensity interval training (HIT) has been utilized as a time-efficient strategy to induce numerous physiological adaptations and improve performance usually associated with "traditional" endurance training (ET). It is not known however, if HIT might lead to improvements in pulmonary function. Therefore we hypothesized that HIT would increase respiratory muscle strength and expiratory flow rates. Fifteen healthy subjects were randomly assigned to an ET group (n = 7) and a HIT group (n = 8). All subjects performed an incremental test to exhaustion (VO2 max) on a cycle ergometer prior to and after training. Standard pulmonary function tests, maximum inspiratory pressure (PImax), maximum expiratory pressure (PEmax), and maximal flow volume loops, were performed pre training and after each week of training. HIT subjects performed a four week training program on a cycle ergometer at 90% of their VO2 max final workload while the ET subjects performed exercise at 60-70% of their VO2 max final workload. All subjects trained three days/ week. The HIT group performed five one-minute bouts with three minute recovery periods and the ET group cycled for 45 minutes continuously at a constant workload. A five-mile time trial was performed prior to training, after two weeks of training, and after four weeks of training. Both groups showed similar (p0.05) increases in VO2 max (~8-10%) and improvements in time trials following training (HIT 6.5 " 1.3%, ET 4.4 " 1.8%) with no difference (p0.05) between groups. Both groups increased (p0.05) PImax post training (ET ~25%, HIT ~43%) with values significantly higher for HIT than ET. There was no change (p0.05) in expiratory flow rates with training in either group. These data suggest that whole body exercise training is effective in increasing inspiratory muscle strength with HIT leading to greater improvements than ET. Also, HIT offers a time-efficient alternative to ET in improving aerobic capacity and performance.

Download or read book The Effects of High Intensity Interval Training Versus Steady State Training on Aerobic Capacity written by Courtney Verona Farland and published by . This book was released on 2014 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: High intensity interval training (HIIT) has become an increasingly popular exercise phenomenon due to its cardiovascular effect and short duration. The purpose of this study was to compare the effects of two HIIT protocols and a steady-state protocol on aerobic capacity following an 8-week training period. Methods: Fifty-five untrained college-aged subjects (17 male, 38 female) were randomly assigned to one of the three training groups (steady-state, Tabata, or Meyer). The steady-state group (n=19) completed 20 minutes of exercise at 90% of ventilatory threshold. The Tabata group (n=21) completed eight intervals of 20 seconds at 170% VO2max, with 10 seconds rest in between each bout. The Meyer group (n=15) completed 13 sets of 30 seconds at 100% of the PPO at VO2max, with 60 seconds of active rest, yielding an output average of 90% of ventilatory threshold. Each subject completed 24 training sessions. Results: Significant increases in VO2max and Peak Power Output for each training group, with no significant differences between groups. There were no significant changes in maximal HR for any training group over the course of the study. The results of this study suggest that steadystate, Tabata, and Meyer protocols elicit similar increases in aerobic capacity.

Download or read book The Effects of a Reduced exertion High intensity Interval Training Protocol on Measures of Cardiovascular and Metabolic Health in Physically Inactive Individuals written by Michael Makela and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiometabolic diseases such as diabetes and cardiovascular disease are a growing threat to the quality of life of the population. Exercise is a frontline approach to treat and prevent cardiometabolic disease and its associated risk factors. The majority of individuals, however, are physically inactive and fail to meet weekly physical activity guidelines primarily due to time-constraints. High-intensity interval training (HIIT) is a time-efficient method of exercise for improving physical fitness and reducing cardiometabolic risk factors compared to moderate-intensity continuous training (MICT). Recent research indicates that the number of repetitions and duration of high-intensity intervals can be reduced without attenuation of health benefits. This study recruited nine physically inactive but otherwise healthy participants (6 female, 3 male) which engaged in a 6 week reduced-exertion HIIT protocol. Participants were assessed before and after a 2 week run-in period, and again upon completion of the exercise protocol to assess the effect on predicted aerobic capacity (VO2max), resting heart rate (HR), resting blood pressure, heart rate variability (HRV), fasting blood glucose, peak power, mean power, body mass, and body fat %. Participants improved predicted VO2max F(2,16)=6.33, p=.009, peak power F(2,16)=10.84, p=.001, and mean power F(2,16)=20.87, p=.00006, but no changes were observed in body mass, body fat %, resting HR, resting blood pressure, resting HRV, and fasting blood glucose. In conclusion, a reduced-exertion HIIT protocol with minimal time-commitment improved predicted VO2max, peak power, and mean power and is a time-efficient alternative or adjunct method of exercise for eliciting health benefits in physically inactive individuals.

Download or read book Science and Application of High Intensity Interval Training written by Laursen, Paul and published by Human Kinetics. This book was released on 2019 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: The popularity of high-intensity interval training (HIIT), which consists primarily of repeated bursts of high-intensity exercise, continues to soar because its effectiveness and efficiency have been proven in use by both elite athletes and general fitness enthusiasts. Surprisingly, few resources have attempted to explain both the science behind the HIIT movement and its sport-specific application to athlete training. That’s why Science and Application of High-Intensity Interval Training is a must-have resource for sport coaches, strength and conditioning professionals, personal trainers, and exercise physiologists, as well as for researchers and sport scientists who study high-intensity interval training.

Download or read book Dr Jordan Metzl s Workout Prescription written by Jordan Metzl and published by Rodale. This book was released on 2016-12-13 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Jordan Metzl's Workout Prescription is a compressed workout guide designed for busy professionals in today's world who have little time for fitness and want to maximize results. In this book, Dr. Jordan Metzl explains the science of the compressed, high-intensity workout and provides a series of progressive workouts ranging from 10 to 30 minutes that can be done anytime, anywhere, using minimal equipment. This book also guides you through topics like motivation, goals, and the importance of proper recovery. Dr. Metzl's high-intensity workout, combined with a scientifically designed and periodized training schedule, delivers maximum results in minimum time in a unique and compelling way that is equally effective for men and women, children and adults.

Download or read book Acute Effects of High intensity Interval Exercise Vs Concurrent Exercise on Flow mediated Dilation in College aged Women written by Ashley N. Allen and published by . This book was released on 2019 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heart disease is the leading cause of female mortality worldwide. As a treatment, exercise can improve cardiac and endothelial function, increase bone mineral density, promote lean muscle mass, and improve pulmonary function. The purpose of this study was to compare the effect of two different modes of exercise on flow mediated dilation in the brachial artery in college-aged women. Ten recreationally active women were assigned to either a high intensity interval group (HT) or a group who completed strength exercises and high intensity interval exercise, called the concurrent exercise group (CT). Measurements of flow mediated dilation (i.e., the hyperemic response of a blood vessel post occlusion) were taken at baseline, after one workout session, and after three workout sessions. There were no differences for FDM% or brachial artery diameter across all time points for either training protocol. Neither a combination of high-intensity interval exercise and resistance exercise or high-intensity interval exercise alone acutely led to structural or functional changes in the brachial artery in recreationally active healthy young women.

Download or read book Effect of High Intensity Interval Training HIIT on Vascular Function and Insulin Sensitivity written by Shinichiro Sugiura and published by . This book was released on 2015 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-intensity interval training (HIIT) is characterized by short bursts of vigorous physical activity, interspersed by periods of rest or low-intensity exercise of varying durations. HIIT may be used as an effective alternative to traditional endurance training, resulting in similar or greater improvements in a number of physiological, performance, and health-related indices in both healthy and in individuals with chronic diseases. The present thesis examined the effects of a two-week HIIT program on measures of aerobic fitness, vascular function (Chapter 3) and insulin sensitivity (Chapter 4). The first study demonstrated no effect on flow-mediated dilation or peak oxygen uptake following two weeks of HIIT with L-arginine supplement compared to HIIT alone, although both groups improved time to exhaustion and the peak work rate during progressive ramp exercise to fatigue. The results of the second study demonstrated six session of HIIT had no effect on glucose appearance and removal (i.e. oral glucose tolerance test, OGTT) or insulin sensitivity in healthy individuals with family history of type 2 diabetes mellitus (T2DM) or in healthy individuals without a family history of T2DM. However, results of the multiple regression analysis indicated that high density lipoprotein (HDL) and low density lipoprotein (LDL) significantly predicted insulin sensitivity in healthy individuals with a family history of T2DM. In order to prevent chronic diseases, such as T2DM, as well as other diseases that have a sedentary lifestyle as a primary risk factor, it is critical that individuals engage in regular physical activity in an effort to curb the rising trends in the prevalence of hypokinetic diseases. Although the results of the present investigation did not provide significant findings in this group of young, healthy adults, further investigations are necessary, including an examination of the physiological adaptations and compliance associated with longer term HIIT exercise programs, the inclusion of additional patient populations, and the optimal combination of exercise intensity, duration and recovery intervals in order to promote HIIT as an effective, efficient alternative training method.

Download or read book High Intensity Functional Training written by Emil Hodzovic and published by Createspace Independent Publishing Platform. This book was released on 2016-03-04 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lots of training methods promise to help you build muscle and lose fat, at the same time. Unfortunately, very few deliver. High Intensity Functional Training is a new and exciting type of training method that does deliver. With this approach, you can gain muscle, lose fat, boost your fitness, and even improve your health, all at the same time! High Intensity Functional Training is similar to high intensity interval training, but far better. Like high intensity interval training, it uses short periods of hard work, with rests in between, for a couple of workouts each week. Unlike high intensity interval training, it makes use of resistance training equipment, especially new tools like battling ropes, kettlebells, and weighted sleds for pushing or towing. This gives it a big advantage over traditional cardio machines, enabling much greater gains in muscle size, and greater losses in body fat. Even better, High Intensity Functional Training is a very time-efficient form of exercise for fat loss. With only a few workouts a week, you will achieve remarkable results. Researchers have suggested that the large energy deficit it produces might be caused by a range of mechanisms on top of simply "burning calories" while you are exercising. These include excess post-exercise energy consumption (EPOC), increases in muscle size leading to gains in resting metabolic rate, reduced appetite, and improved exercise enjoyment, which leads to greater consistency. What is more, you can structure your High Intensity Functional Training workouts to increase enjoyment and minimise muscle soreness by performing exercises with no lowering phase (such as sled pushes). This makes your workouts even easier to perform regularly, and with less discomfort. Buy your copy now, to learn about the underlying research into High Intensity Functional Training, to see guidelines for how to use this training method, and to obtain a series of workouts that you can use straight away.

Download or read book THE EFFECTS OF HIGH INTENSITY INTERVAL TRAINING ON THE POST STROKE POPULATION A SYSTEMATIC REVIEW written by Kristian Lynne Wendel and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: Conduct a systematic review to determine the feasibility and effectiveness of high-intensity interval training (HIIT) on the post-stroke population.Data Sources: Academic Search Ultimate, CINAHL, and PubMed Central were searched April 2018-January 2019. Inclusion criteria included: studies published between 2010-2019, in English, participants were of the post-stroke population, and HIIT interventions.Study Selection: Thirteen studies were identified: six randomized controlled trials and seven outcome studies. PEDro scores ranged from three to eight. Points were commonly lost secondary to lack of blind subjects, therapists, and assessors. All articles were included in PEDro scoring, as well as two additional studies used as informational references. Data Extraction: Data was extracted by three authors and analyzed independently.Data Synthesis: Nine studies performed HIIT on a treadmill, one cycling, one NuStep, one task-oriented, and one study on a stepper. HIIT improved VO2 max in the post-stroke population in five out of seven articles. Of the five, one study found continued improvement after one year. Participants in eight out of nine studies had improved walking performance following HIIT. Individually, four studies found gains in grip strength, skill retention, functional reach, and HR peak. HIIT has improved corticomotor excitability and nerve conduction latency in two separate studies. Conclusion: With proper pre-screening and monitoring, HIIT in post-stroke rehabilitation proved to be both feasible and more effective than conventional therapy protocols. Incorporating principles of HIIT into treatment programs can improve walking performance, increase aerobic capacity, and overall quality of life.

Download or read book Training Effect of a High Intensity Interval Training HIIT Program Using Upper Extremity Exercise written by Nicole M. Mier and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The purpose of this study was to investigate the effects of a high intensity interval training program (HIIT) using the upper extremities on peak oxygen uptake (VO2peak), peak heart rate (HRpeak), total time-to-fatigue (TTF), peak power output (PPO), rating of perceived exertion (RPE), and blood lactate concentrations (bLa). Results showed significant (p d"0.05) improvements by the HIIT group in VO2peak, HRpeak, PPO, and TTF when compared to a continuous training (CT) group. Results of this study suggest that upper extremity HIIT appears to produce greater improvements in several physiological outcome measures when compared to CT and may be an effective way to improve cardiopulmonary fitness. Furthermore, a HIIT program using the upper extremities as little as 2 days per week appears to be a viable way to improve factors that contribute to cardiopulmonary fitness, muscular fitness, and performance, while being an efficient use of time.

Download or read book The Effects of Low Volume High Intensity Interval Training Vs Periodized High Intensity Interval Training on Cardiorespiratory Fitness in Sedentary Women with Obesity written by Amy Clark and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To investigate effects of two high intensity interval training (HIIT) regimes on changes in maximal oxygen uptake (VO2max), O2 pulse and ventilatory threshold (VT) in obese, sedentary women. Methods: 17 obese sedentary women (age and BMI=37.5±10.5 years and 39.0±4.7 kg/m2) participated in a six-week exercise intervention with three training sessions per week. Participants were randomized to low volume HIIT (LOW) (n=9, VO2max=21.5±3.2 mL/kg/min) or periodized HIIT (PER) (n=8, VO2max=17.3±2.4mL/kg/min). VO2max and peak power output (PPO) were measured on a cycle ergometer at baseline and at 3 and at 6 weeks using a ramp exercise test. Women in LOW completed repeated 60 second bouts of HIIT at 70-85% PPO; whereas, women in PER performed a different number of bouts and intensities each week. Results: There was a significant difference in relative (p=0.002; LOW: 21.5±3.2 vs. 22.5±3.2 mL/kg/min; PER: 17.3±2.41 vs. 18.0±2.2 mL/kg/min) and absolute (p=0.001; LOW: 2.1±0.3 vs. 2.2±0.3 L/min; PER: 1.9±0.4 vs. 2.0±0.3 L/min) VO2max across time, but no interaction (p=0.79 and p=0.53). There was no change in VT expressed as VT % VO2max (p=0.24) yet there was a group X time interaction (p=0.043). VT expressed in Watts was significantly different over time (p=0.001) but there was no group X time interaction (p=0.09). O2 pulse significantly increased from pre- to post-training (p=.003) but there was no time X group interaction (p=0.95). Conclusion: Although there were no significant differences between regimes, HIIT elicits significant changes in VO2max, O2 pulse and VT in sedentary women with obesity, which are improve health status.

Download or read book The Effects of High Intensity Interval Training on Resting Mean Arterial Pressure and C reactive Protein Content in Prehypertensive Subjects written by Benjamin C. Skutnik and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Subjects with prehypertension are at risk for developing hypertension (HTN). Hypertension is associated with low-grade systemic inflammation (LGSI). Aerobic exercise training (ET) is a proven means to reduce both blood pressure and LGSI in healthy and diseased subjects. Recently, high intensity interval training (HIIT) has been show to elicit similar cardiovascular and metabolic adaptations as ET in healthy and at-risk populations in a more time efficient manner. Therefore, we hypothesized that HIIT would elicit greater reductions in blood pressure and LGSI than ET. Twelve pre-hypertensive subjects (systolic blood pressure 127.0 ± 8.5 mmHg; diastolic blood pressure 86.2 ± 4.1 mmHg) were randomly assigned to an ET group (n=5) and a HIIT group (n=7). All subjects performed an incremental test to exhaustion (VO2max) on a cycle ergometer prior to, after 4 weeks, and after 8 weeks of training. Resting heart rate and blood pressure were measured prior to and three times a week during training. LGSI was measured via high-sensitivity C-reactive protein (hs-CRP) prior to, after 4 weeks and after 8 weeks of training. ET subjects performed an eight week exercise training program at 40% VO2 reserve determined from the VOVO2[subscript]max test, while HIIT subjects performed exercise at 60% peak power determined from the VO2[subscript]max test. ET group trained four days/week while HIIT trained three days/week. ET exercised for 30 minutes continuously at a constant workload and cadence of 60 rpm while HIIT performed a protocol on a 1:1 work-to-rest ratio at a constant workload and cadence of 100 rpm. Both groups showed similar (p0.05) decreases in mean arterial (ET = -7.3%, HIIT = -4.5%), systolic (ET = -6.6%, HIIT = -8.8%), and diastolic (ET= -9.7, HIIT= -8.2%) blood pressure. HIIT decreased in LGSI ( -33.7%) while ET did not change LGSI (p0.05). VOVO2[subscript]max increased ~25% with both HIIT and ET with no differences (p>0.05) between groups. These data suggest both HIIT and ET similarly decreased resting blood pressure and increased VO2max while HIIT was effective in decreasing LGSI in subjects who were pre-hypertensive.