Download or read book The Effect of a High Intensity Interval Exercise Bout on Addictive Behaviors in Overweight Obese Adults written by Sarah Zaldivar and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of a Single Low Volume High intensity Interval Training Bout on Excess Post exercise Oxygen Consumption Levels Between Obese and Non obese Adults written by Thomas J. Madden and published by . This book was released on 2018 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The purpose of the current study was to determine if obesity affects the excess post-exercise oxygen consumption (EPOC) values and caloric expenditure (CE) after a single bout of high intensity interval exercise (HIIE). Twenty adults (12 men and 8 women) were divided into two groups based on BMI: obese (OB) or non-obese (NOB). All subjects completed a single 20 min HIIE bout on a Velotron cycle. Intervals were 1 min of exercise at 85-85% HRmax followed by 1 min of rest. Oxygen consumption was measured post exercise to estimate EPOC and CE. There was a significant difference in the absolute total EPOC (L) between OB (M = 3.80, SD = 1.27) and NOB (M = 2.40, SD = 0.88) groups, t(18) = 2.88, p = .01, d = -1.29. There was a significant difference in CE (kcal) between OB (M = 19.03, SD = 6.35) and NOB (M = 11.99, SD = 4.41) groups; t(18) = 2.87, p = .010, d = -1.29. No significant mean differences were found in time (min) spent in EPOC and absolute magnitude (L/min) between OB and NOB. A medium effect size was found with time spent in EPOC (d = .64) and the absolute magnitude (d = .69) between NOB and OB groups. Differences between OB and NOB groups may be attributed to the total mass of an individual while relative values seem to be similar between groups.

Download or read book The Effect of an Acute Bout of High intensity Interval Exercise Compared to Moderate intensity Or No Exercise on Growth Hormone Secretion in Overweight Sedentary Young Women written by Sarah E. Deemer and published by . This book was released on 2017 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a strong positive relationship between exercise intensity and pulsatile GH release. It has yet to be determined if high-intensity interval exercise (HIE) can influence pulsatile GH secretion, especially overnight, which accounts for the majority of daily GH release. The purpose of this study was to determine if HIE significantly increased GH secretion compared to continuous moderate-intensity exercise (MOD), or no exercise (CON) in young women. Five young, sedentary women (mean ± SD age: 22.6 ± 1.3 years; BMI: 27.4 ± 3.1 kg/m2; body fat: 39.2 ± 1.7%; VO 2max: 29.4 ± 5.7 ml/kg/min) were studied on three different occasions during the follicular phase of their menstrual cycle (CON: no exercise; MOD: 30-min of continuous cycling at 50% of peak power determined from the VO 2max test; and HIE: 4 30-s “all-out” sprints with 4.5 min of recovery between each sprint). Each trial was randomly assigned and separated by a minimum of one month. For each visit, participants reported to the lab at 1700 hr, exercised from 1730 – 1800 hr, and remained in the lab until 0700 hr the following morning. The overnight GH secretory profile of each trial was determined from 10-min sampling of venous blood from 1730 – 0600 hr (12.5 h) using deconvolution analysis. Deconvolution GH parameters were log transformed prior to statistical analyses. Calculated GH AUC (0 – 120 min) was significantly greater in HIE (1018.2 ± 576.1 ng/mL/120 min) than CON (181.7 ± 138.9 ng/mL/120 min, p = .04), but not MOD (544.7 ± 160.7 ng/mL/120 min). Total GH secretory rate (ng/mL/12.5 h) was significantly different between CON (1040.3 ± 242.0) and HIE (1831.2 ± 873.8, p = .05), but MOD (1429.2 ± 206.0) was not different from CON (p = .08). For these untrained, overweight, sedentary young women, a single bout of exercise was insufficient to significantly affect overnight pulsatile GH secretion. Aerobic fitness, prior training, as well as several metabolic factors associated with obesity (e.g., increased insulin and circulating free fatty acids), can also influence GH secretion and should be taken into account as potential mediators of the GH response to exercise.

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 Effect of High intensity Interval Training HIT on Gut Microbiota in Humans written by Julia Cree and published by . This book was released on 2018 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the light of rising obesity rates and the increasing incidence of metabolic disease which contributes significantly to both global and local health problems, novel approaches to reduce the burden of disease must be explored. It is now widely acknowledged that gut microbiota can affect host metabolism, and its composition and activity are an important influence on overall health. Whilst exercise and physical activity have long been recognised as a way to prevent or delay numerous chronic conditions, emerging evidence from rodent studies, supported by limited research in humans suggests that modulation of gut microbiota may be one of the potential mechanisms that exercise improves health. The purpose of this study was to investigate the effect of a high-intensity exercise intervention on the gut microbiota of lean and overweight/obese, healthy adult males in Auckland, New Zealand. Participants were recruited to either lean (BMI 25) or overweight/obese (BMI 28) groups for nine high-intensity interval training (HIT) sessions over 3 weeks. Gut microbiota composition, cardiorespiratory fitness, blood and fecal biomarkers of metabolic and inflammatory health were measured pre and post intervention with the ultimate goal of increasing the understanding of how possible exercise mediated changes in gut microbiota may improve metabolic health. Overall results demonstrate that while a short term HIT intervention is limited in its capacity to modify the composition of gut microbiota in healthy young men, and did not change the body composition of participants or blood or fecal biomarkers of metabolic and inflammatory health, it is an effective exercise protocol for improving cardiorespiratory fitness irrespective of BMI. Changes in fecal pH observed indicate HIT can bring about modifications in the gut, dependent on BMI status. Our analysis of gut microbiota revealed limited compositional differences between BMI groups at baseline line and as a consequence of HIT. We did not demonstrate any significant changes in gut microbiota, apart from an increase in Faecalibacterium prausnitzii in lean participants. Inter- and intra-subject variation presents vast challenges in determining the effect of HIT on gut microbiota composition and it remains unclear whether HIT is a useful strategy in this regard.

Download or read book Effects of High intensity Interval Exercise HIIE Vs Moderate intensity Continuous Exercise MIE on Postprandial Substrate Oxidation After Consumption of an Isocaloric High Sugar Fat Meal in Healthy Adults written by Jacob Michael Fleming and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Obesity prevalence is high in the United States, in part due to increased fat storage following consumption of high fat/carbohydrate (sugar) foods. Following a meal, carbohydrate stimulates its own oxidation, while simultaneously suppressing fat oxidation, ultimately leading to fat storage. Aerobic exercise preceding a meal increases fat oxidation in the postprandial period, which may reduce fat storage. The ideal exercise prescription for optimal postprandial fat oxidation is unknown. The effect of low and moderate intensity continuous exercise (MIE) has been studied extensively, while the effects of high-intensity interval exercise (HIIE) on post-prandial substrate oxidation has not been examined. The purpose of this study was to compare the effects of MIE and HIIE on postprandial substrate oxidation after consumption of an isocaloric meal (2 glazed donuts; 520 kcal) in healthy adults. Ten subjects (8 males, 2 females; age=24yr, BMI=24 kg/m2) completed three conditions in random order: 1) no exercise control; 2) MIE: cycling at 60-75%HRmax; 3) HIIE: cycling at 90-95%HRmax. The duration of each exercise bout was sufficient to expend approximately 520 kcal, the energy equivalent of the donuts, which were consumed 1 hour post-exercise. Immediately after consuming the donuts, pulmonary ventilation and gas exchange were measured breath-by-breath continuously and recorded (min-by-min) for 5 hours. Repeated measures analysis of covariance was used to compare the mean differences in outcome variables accounting for gender. Absolute postprandial fat oxidation (g/5 hours) was 17.3±5.4, 27.1±9.6 and 23±1.2 for control, MIE and HIIE trials respectively, with the postprandial fat oxidation significantly greater for the two exercise conditions compared to control. Relative to baseline values, both exercise conditions resulted in cumulative net postprandial fat oxidation significantly greater than control (control = -1.79±3.99g; MIE = 11.51±8.41g, HIIE= 9.51±5.20g). Therefore, results indicate that exercise most certainly increases postprandial fat oxidation, and that exercise type, either MIE or HIIE, is not as important as total energy expended. The fact that exercise of ~1 hour was required to oxidize the amount of fat in two donuts, that required only a few minutes to consume, highlights the challenges of using exercise for weight control in an obesogenic environment.

Download or read book An Interval Training Bout on Cognitive Performance in Healthy Adults written by David Young and published by . This book was released on 2014 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: Cognitive performance has been shown to improve with regular aerobic exercise training. Despite this, most Americans do not adhere to current exercise prescription guidelines. High intensity interval training (HIIT) has been suggested as a lower time commitment, more enjoyable alternative to regular aerobic exercise. Twenty nine apparently healthy college-aged adults were recruited and administered a high intensity interval training session with a pre- and 24 hours-post-exercise cognitive performance test. No changes were found in performance following the bout of high intensity interval training. No significant interactions were observed when comparing performance to gender, training age, training goal, or intra-exercise rating of perceived exertion (RPE). More study is needed to assess the efficacy of a long term HIIT intervention on cognitive performance changes using more sensitive testing procedures.

Download or read book Perceptual Responses to High Intensity Interval Training Among Overweight and Obese Individuals written by John Thomas Halvorson and published by . This book was released on 2016 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poor diet and exercise adherence is resulting in the rise of chronic diseases. High intensity interval training (HIIT) has the ability to improve adherence as it takes less time to complete and has changes in intensity and monotony. The aim of the study was to analyze whether participants prefer HIIT in comparison to continuous aerobic exercise (CON). The hypothesis was that HIIT would be preferred and enjoyed more than CON both during and following the exercises. Participants were men and women (n=14) between the age of 30-55 years with a BMI of 25-35 kg/m2. Participants completed three exercise conditions: CON) a 45 minute walk at 60% of age predicted maximal heart rate (APMHR), HIIT60) a 20 minute HIIT exercise in which the speed and incline was changed between a high intensity of 80% APMHR and 60% APMHR every 60 seconds for a total of 10 cycles, and HIIT90) a 21 minute HIIT exercise in which the speed and incline was changed between a high intensity of 80% APMHR and 60% APMHR every 90 seconds for a total of 7 cycles. Heart rate (HR), exercise enjoyment during the exercise as measured by the exercise enjoyment scale (EES), and ratings of perceived exertion (RPE) were collected at multiple time points during the exercise. Five minutes of post exercise oxygen consumption was measured immediately and 30 minutes following the exercise sessions. General feelings as measured by the feeling scale (FS) and physical activity (PA) enjoyment as measured by the physical activity enjoyment scale (PACES) was measured 5 minutes and 35 minutes following the exercise sessions. HR and RPE were both higher in HIIT60 and HIIT90 compared to CON. In task exercise enjoyment was not higher between conditions. PA enjoyment was higher in both HIIT60 and HIIT90 compared to CON 5 minutes following the exercises. General feelings in HIIT60 was the only condition to increase 35 minutes compared to 5 minutes following the exercise. We conclude that HIIT is a more preferred exercise than CON as shown by higher preferences for HIIT90 and HIIT60 as well as higher ratings of post exercise PA enjoyment.

Download or read book Effects of Eight Weeks of High intensity Interval Training on Blood Glucose Control Endothelial Function and Visceral Fat in Obese Adults written by Brandon J. Sawyer and published by . This book was released on 2013 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiovascular disease (CVD) is the number one cause of death in the United States and type 2 diabetes (T2D) and obesity lead to cardiovascular disease. Obese adults are more susceptible to CVD compared to their non-obese counterparts. Exercise training leads to large reductions in the risk of CVD and T2D. Recent evidence suggests high-intensity interval training (HIT) may yield similar or superior benefits in a shorter amount of time compared to traditional continuous exercise training. The purpose of this study was to compare the effects of HIT to continuous (CONT) exercise training for the improvement of endothelial function, glucose control, and visceral adipose tissue. Seventeen obese men (N=9) and women (N=8) were randomized to eight weeks of either HIT (N=9, age=34 years, BMI=37.6 kg/m2) or CONT (N=8, age=34 years, BMI=34.6 kg/m2) exercise 3 days/week for 8 weeks. Endothelial function was assessed via flow-mediated dilation (FMD), glucose control was assessed via continuous glucose monitoring (CGM), and visceral adipose tissue and body composition was measured with an iDXA. Incremental exercise testing was performed at baseline, 4 weeks, and 8 weeks. There were no changes in weight, fat mass, or visceral adipose tissue measured by the iDXA, but there was a significant reduction in body fat that did not differ by group (46±6.3 to 45.4±6.6%, P=0.025). HIT led to a significantly greater improvement in FMD compared to CONT exercise (HIT: 5.1 to 9.0%; CONT: 5.0 to 2.6%, P=0.006). Average 24-hour glucose was not improved over the whole group and there were no group x time interactions for CGM data (HIT: 103.9 to 98.2 mg/dl; CONT: 99.9 to 100.2 mg/dl, P>0.05). When statistical analysis included only the subjects who started with an average glucose at baseline> 100 mg/dl, there was a significant improvement in glucose control overall, but no group x time interaction (107.8 to 94.2 mg/dl, P=0.027). Eight weeks of HIT led to superior improvements in endothelial function and similar improvements in glucose control in obese subjects at risk for T2D and CVD. HIT was shown to have comparable or superior health benefits in this obese sample with a 36% lower total exercise time commitment.

Download or read book Incretin Response to Acute Exercise of Differing Intensities in Obese Women written by Lauryn Nyhoff and published by . This book was released on 2013 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine the incretin response to an acute continuous, moderate intensity (ModEx) and high-intensity interval (IntEx) exercise bout in obese women, and how previous exercise affects the glycemic and incretin response to a subsequent dinner meal. Sedentary, obese women (BMI>30kg/m2 ; 18-35 yr) participated in three conditions in a randomized, counterbalanced design: 1) No exercise/rest (NoEx), 2) continuous, moderate intensity exercise at 55% VO2max (ModEx), and 3) high-intensity aerobic interval exercise at 4 min 80% VO2max/3 min 50% VO2max (IntEx), followed by a standardized mixed dinner meal (800kcal; 65% CHO, 20% fat, 15% protein). Blood was sampled every 10 min for the first 160 min and then every 30 min for the final 2 h of the study day. Samples were analyzed for glucose, lactate, insulin, glucagon, GLP-1, GIP, and C-Peptide. Lactate concentrations increased during exercise in ModEx (6.2±0.7 mg/dL) and even greater in IntEx (15.4±2.5 mg/dL) conditions compared to NoEx (3.7±0.2 mg/dL) (p=0.01; p=0.001, respectively) which persisted into recovery (p=0.01). Glucose concentrations were not different between groups during exercise (p=0.38). Mean GIP and GLP-1 was not different between groups during exercise (p>0.05), but during recovery, GLP-1 concentrations were higher in ModEx condition compared to NoEx (p=0.03). In response to a mixed dinner meal, insulin and C-peptide iAUC was lower in ModEx condition compared to NoEx (p=0.002; p=0.005, respectively). No differences between groups were detected for glucose, GIP, GLP-1, hepatic insulin extraction, insulin secretion, or insulin sensitivity following the meal. Regardless of intensity, GLP-1 and GIP concentrations were increased during the latter stages of exercise, accompanied by a decrease in plasma insulin concentrations; opposite of the postprandial insulinotropic response previously associated with the incretin hormones. Insulin concentrations were reduced more so in the ModEx condition which may be attributed to enhanced peripheral insulin action and increased hepatic extraction of insulin compared to NoEx. The glycemic responses to the meal were similar between exercise intensities. The inability of acute exercise to impact postprandial glycemic responses may be partially attributed to diurnal variation of insulin secretion and action in the evening.

Download or read book High Intensity Interval Training written by Sean Bartram and published by Dorling Kindersley Ltd. This book was released on 2015-07-07 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: HIIT, or High-Intensity Interval Training, is a new workout trend that involves short, intense bursts of exercise following by periods of lower-intensity exercise or rest. The science behind HIIT is that through these intense bursts of activity, the body burns more calories in a shorter period of time than traditional exercise routines that take longer and provide less fat-burning benefits. Although HIIT may just sound like another trend, there's considerable science that says the benefits are real, and it's considered to be one of the most efficient and effective ways to get in top physical condition and burn more fat in less time. Idiot's Guides: High Intensity Interval Training is a full color, visual guide that is packed with over 80 exercises, structured routines, and fun yet intense programs that can be done anywhere, and at any time. Step-by-step, readers will learn how to do exercises the right way and reach a new level of fitness and reap fitness benefits that other, more traditional workouts can't offer.

Download or read book The Art of Health Hacking written by TJ Anderson and published by Morgan James Publishing. This book was released on 2018-04-10 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TJ shows us we don't lack the science, information or technology to live healthy, but the art to use these resources properly. Read The Art of Health Hacking to learn how vulnerability, self compassion, and personal health empowerment can put you back in charge of yourself. You'll be glad you did." -Dave Asprey, Founder of Bulletproof The Art of Health Hacking is a self-coaching guide for the modern-day health-conscious consumer who wants to build their All-Star healthcare team, rely less on a poorly designed sick-care system and instead, build their own “health hacker” approach rooted in prevention and high performance. In his book, TJ Anderson profiles what’s he’s learned as a health coach, and perhaps more importantly as a self-coach, in the fields of biohacking, behavior change, and our ever-evolving healthcare system. Merging the fundamentals with the cutting-edge, The Art of Health Hacking will teach you how to evolve your definition of health, create a healthier relationship with stress, and strategically design your own lifestyle based on your intentions and desires. Come along for the ride and experience what it’s like to elevate your state of total health and performance!

Download or read book The Effect of High intensity Interval Exercise on Postprandial Endothelial Function in Youth written by Justin Ross Ryder and published by . This book was released on 2014 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: In adults, consuming a high-fat meal can induce endothelial dysfunction while exercise may mitigate postprandial endothelial dysfunction. Whether exercise is protective against postprandial endothelial dysfunction in obese youth is unknown. The purpose of this study was to determine if high-intensity interval exercise (HIIE) performed the evening prior to a high-fat meal protects against postprandial endothelial dysfunction in obese adolescent males. Fourteen obese adolescent males (BMI%tile=98.5±0.6; 14.3±1.0yrs) completed the study. After initial screening, participants arrived, fasted at 9:00 in the morning where brachial artery flow-mediated dilation (FMD) was measured using duplex ultrasound after 20min of supine rest (7.0±3.0%) and completed a maximal exercise test on a cycle ergometer (VO2peak=2.6±0.5 L/min). Participants were randomized and completed 2 conditions: a morning high-fat meal challenge with evening prior HIIE (EX+M) or a morning high-fat meal challenge without prior exercise (MO). The EX+M condition included a single HIIE session on a cycle ergometer (8 X 2min at ≥90%HRmax, with 2min active recovery between bouts, 42min total) which was performed at 17:00 the evening prior to the meal challenge. In both conditions, a mixed-meal was tailored to participants body weight consisting of 0.7g of fat/kg of body weight consumed (889±95kcal; 65% Fat, 30% CHO). FMD was measured at fasting (>10hrs) and subsequently measured at 2hr and 4hr after high-fat meal consumption. Exercise did not improve fasting FMD (7.5±3.0 vs. 7.4±2.8%, P=0.927; EX+M and MO, respectively). Despite consuming a high-fat meal, FMD was not reduced at 2hr (8.4±3.4 vs. 7.6±3.9%; EX+M and MO, respectively) or 4hr (8.8±3.9 vs. 8.6±4.0%; EX+M and MO, respectively) in either condition and no differences were observed between condition (p(condition*time)=0.928). These observations remained after adjusting for baseline artery diameter and shear rate. We observed that HIIE, the evening prior, had no effect on fasting or postprandial endothelial function when compared with a meal only condition. Future research should examine whether exercise training may be able to improve postprandial endothelial function rather than a single acute bout in obese youth.

Download or read book The Effects of High intensity Interval Training on Postural Control Dynamic Balance and Muscular Strength Among Older Adults written by Antonio Ross and published by . This book was released on 2015 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Aging adults are at an increased risk of falling, dependency, and disability due to a decline in physical conditioning. Research has determined muscle weakness and poor balance are associated with these risks. Resistance training may cause muscular strength improvements at any velocity or intensity. High-intensity interval training (HIIT) is an emerging style of fitness, which has shown to be beneficial to muscular strength. PURPOSE: To determine the effects of HIIT on postural sway, dynamic balance, and lower body strength among active older adults. METHODS: The experimental group (EG) participated in the intervention two times per week for 4-weeks. The control group (CG) continued their current fitness routine. HIIT participants utilized exercises which simulated muscle groups that influence balance. Participants completed interval bouts ranging from 20-30s accompanied by a 30 – 40s recovery phase. Participants were assessed on postural sway in tandem, semi-tandem, and single leg stances performed on the TekscanTM pressure mat. Each stance was performed with eyes-open (EO) and eyes-closed (EC). Dynamic balance was measured with the Timed-Up-and-Go (TUG), and lower extremity strength was measured with the 30-Second Chair Stand test. The Wilcoxon Sum of Ranks and Mann-Whitney U tests were used to determined differences within and between groups, respectively. RESULTS: Postural sway significantly improved during eyes open stances (p 0.05). The experimental group did show a moderate to strong (d .30) reduction in sway in four different EO stances. The EC stances in the EG showed three significant improvements (p > 0.05). The EG experienced significant improvements in the TUG (p =.04) and approached significant increases in chair stand performance (p =.07). CONCLUSION: HIIT significantly improved dynamic balance and muscular strength, and meaningfully improved postural sway. Future research should utilize HIIT for a longer duration to examine its effects."--Abstract.

Download or read book Interrupting Prolonged Sedentary Behavior with Periodic Interval Exercise written by Brooke Judith Edwards and published by . This book was released on 2021 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: High levels of postprandial lipemia are considered an independent risk factor for cardiovascular disease, one of the leading causes of death worldwide. An acute bout of exercise has been shown to attenuate the plasma triglycerides response the next morning following a meal high in fat. However, evidence suggests that this benefit of exercise is not always observed when time spent sitting is drastically increased. This phenomenon is being described as exercise resistance, where the metabolic benefits of exercise do not manifest. A previous study found that breaking up prolonged sitting with inertial load ergometer (ILE) (5 x 4second sprints with 45 seconds rest) sprints every hour for 8 hours attenuated postprandial lipemia in healthy adults. The purpose of this study is to determine if these benefits can still be gained with less frequent intervals of breaking up induced sedentary behavior (monitored by restricting step count to 4500 steps/day) using the same exercise protocol. In a repeated measure, crossover design, eight healthy, young adults (four men and four women) participated in three trials which lasted a total of four days each: two controlled activity days, one intervention day, and a high fat tolerance test (HFTT) on day 4. The controlled activity days required participants to take less than 4500 steps each day to induce exercise resistance. The interventions consisted of taking less than 4500 steps/d with no exercise (SIT), with 4 bouts of ILE sprints (SIT + 4), and with 2 bouts of ILE sprints (SIT + 2) spread throughout the day. The outcome measure was postprandial metabolism following a high fat meal. During the HFTT, plasma triglycerides and expired air were collected hourly for four hours after meal ingestion. Incremental and total area under the curve (AUC) for plasma triglycerides concentration were calculated and indirect calorimetry was performed to quantify fat oxidation. No differences (P0.05) were found between interventions for plasma triglycerides total and incremental AUC or fat oxidation. These results suggest 2 or 4 bouts of ILE sprint exercise breaking up 8-hours of sitting are not enough to ameliorate the postprandial responses to a high fat meal the next day

Download or read book Kaidato de Arcila written by and published by . This book was released on 1960* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of High intensity Interval Training on Executive Function in Adolescents Hospitalized for a Mental Illness written by Jacqueline Lee and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: Impaired inhibitory control, one of the core executive functions, is common among individuals with mental illness. However, inhibitory control is essential for successful treatment and recovery. Inhibitory control is extremely vulnerable to developmental disruption during adolescence, a time when mental illness is first diagnosed. An acute bout of exercise has been shown to improve inhibitory control in healthy adolescents, however, to our knowledge there are no studies evaluating this effect in adolescents with mental illness. Purpose: The primary goal of this project was to examine the effect of an acute bout of high-intensity interval training on inhibitory control immediately, and 30 minutes following exercise in adolescents hospitalized for mental illness. The secondary goal was to assess the feasibility of using this type of exercise as an adjunct to current treatment. Methods: Participants were recruited through the inpatient mental health unit at the Children's Hospital of Eastern Ontario. They performed exercise and control conditions in a randomized, counterbalanced manner. The Colour-Word Stroop Task was assessed pre, post, and 30-minutes-post on both days. The exercise condition included a 12 minute HIIT circuit, consisting of body weight exercises performed in a 1:1 work to rest ratio. The control condition involved reading magazines. Repeated-measures ANOVA evaluated changes in Interference Cost, the reaction time cost of responding to trials where the ink and colour do not match, and overall accuracy. Feasibility was assessed through recruitment and completion rates, as well as changes in affect and acceptability of the high-intensity interval training. Results: There was a significant interaction between condition and time for the Interference Cost measure, F(1.6,43.3)=13.6, p