Download or read book Effects of Vertical Whole body Vibration Parameters on Rate of Muscle Fatigue in Submaximal Isometric Contraction written by Mylène Saucier and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibration training is a modality used to improve human performance. measured by muscle strength and power via a reflexive muscle contraction called Tonic Vibration Reflex. Reported improvements of this novel training practice are inconsistent which leads to poor understanding of Whole-Body Vibration (WBV) and suggest lack of research supporting the beneficial physiological effects of the modality on the human body. This study examined the effects of vertical vibration parameters (frequency and amplitude) on the rate of muscle fatigue while subjects performed an isometric single leg squat exercise under WBV until exhaustion. Thirty healthy college level athletes volunteered in this study. Three levels of each independent parameter were examined for nine combinations of vibration. Surface electromyographic (SEMG) activity of eight muscles was measured: tibialis anterior, fibularis longus, vastus medialis oblique (VMO), gastrocnemius (medial head), biceps femoris, gluteus medius, rectus abdominis, and erector spinae (L4). Spectral analysis of the integrated EMG (iEMG) was performed to determine the rate of muscle fatigue under each vibration condition. Analysis of variance evaluating the effect of the vibration parameters was performed on the spectral analysis responses with a significance of p ≤0.05. Results found no main effect of any individual vibration parameter or any interaction effect on the rate of muscle fatigue. These findings aid our understanding of vibration parameter effects on the human body. Since vibration training's popularity is still growing, further studies on the matter should be pursued.

Download or read book THE EFFECT OF A SIX WEEK WHOLE BODY VIBRATION TRAINING PROTOCOL ON THE PHYSICAL CAPACITIES AND FATIGABILITY OF OVERWEIGHT YOUNG FEMALE ADULTS written by Suzanne Serresse and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rate of Fatigue During Repeated Submaximal Contractions written by Thomas E. Dolmage and published by . This book was released on 1988 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A 60 Second Exposure of Whole Body Vibration Has No Effect on Muscular Strength Or Vertical Jump Height written by John D. Welch and published by . This book was released on 2016 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 30 years, researchers have investigated the effects of whole body vibration (WBV) platforms on athletic performance. WBV is a modality in which an individual stands on a vibrating platform to obtain performance effects. Frequency and amplitude of the vibration are the commonly adjusted parameters. The use of WBV as a modality for athletes has gained traction in response to emerging evidence demonstrating significant gains in performance measures including increased jump height and muscular strength. Collective results from several studies suggest a single vibration frequency, optimal vibration frequency (OVF), exists which elicits the greatest effect on performance. However, due to large variations in methodology it remains unknown if an OVF exists and, even more importantly, how OVF for individual athletes should be determined and utilized. There is a need to further identify how various parameters (i.e., frequency or exposure time) impact OVF as a means of enhancing our understanding and utilization of OVF on performance outcomes. The purpose of this study was to determine the WBV frequency that optimizes knee extensor torque and countermovement jump height in physically active adults between 18 and 40 years of age. The central hypothesis was that a single WBV frequency (35 Hz) for optimizing knee extensor torque (KET) and countermovement jump height (CMJ) would be identified. A comparison of KET and CMJ across 1) three independently delivered whole body vibration frequencies and 2) determined if one frequency was associated with greater KET and CMJ to a greater extent than the other frequencies and a control condition. I hypothesized that one of the WBV frequencies would result in greater KET and CMJ when compared to the other frequencies and a control. Additionally, I analyzed the distribution of an individual participants increase in KET and CMJ across three different WBV frequencies. I hypothesized that a greater number of participants would exhibit a larger increase in KET and CMJ after a 60 second exposure of whole body vibration at 35 Hz. Twenty-six recreationally active adults performed pre and posttest isometric KET and CMJ after a 60 second exposure of WBV at a specific frequency. From recorded KET and CMJ height, the largest value from the trials were calculated. There were no changes in KET or CMJ after WBV treatments when compared to pretest and control values. The results suggest that a 60 second exposure of WBV has no effect on maximal KET or CMJ when coupled with a 2-hour rest period. It could be suggested that the compounding of multiple frequencies and increased exposure time within a short time period could produce an effect. To better understand if WBV affects performance, incrementally increasing exposure length with a washout period and a signal that accounts for all frequencies at once warrants being studied.

Download or read book Effects of Muscle Fatigue on Muscle Latency and Muscle Activation Under Whole Body Vibration written by Alexander Nolan and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Whole-body vibration and muscle fatigue have both been shown to delay the trunk muscle reflex response and increase trunk muscle activation, leading to an increased risk of low back injuries. However, the effects of whole-body vibration on previously fatigued trunk muscles have never been tested, despite tests showing that prolonged exposure to whole-body vibration can lead to muscle fatigue. The purpose of this research was to investigate the effects of muscle fatigue on muscle latency, muscle activation and perceived discomfort when exposed to whole-body vibration. The results showed that a fatigued muscle state resulted in increased muscle latency, muscle activation and perceived discomfort, which all escalate the risk of low back injuries. Additionally, the ISO 2631-1 comfort ratings did not increase with fatigue, showing a disconnect between these comfort ratings and the perceived discomfort ratings in a fatigued muscle state.

Download or read book The Effect of Whole Body Vibration on Back Squat Standing Long Jump and Vertical Counter movement Jump Performance written by Barry M. Parker and published by . This book was released on 2010 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The purpose of the investigation was to examine the effects of Whole Body Vibration (WBV) on lower body strength and power as measured through estimated 1-RM back squat, standing long jump, and vertical counter-movement jump. Female (N = 9) collegiate Division III varsity softball players completed the training and testing protocol. Each subject completed 3 weeks of WBV training and 3 weeks of conventional strength training. All subjects were pretested to gather baseline values. Subjects were tested at week 4 and week 8 to measure percent change of testing values. Three 2 X 2 mixed factorial ANOVAs were computed for percent change in lower body strength and power. No significant difference (p > .05) was found between groups in percent change for standing long jump, vertical counter-movement jump, and estimated 1-RM back squat. No significant differences (p > .05) were found between groups and testing period in percent change for estimated 1-RM back squat, standing long jump, and vertical counter-movement jump.

Download or read book Whole body Vibration and Its Effects on Electromechanical Delay and Vertical Jump Performance written by Deja Lee Stevenson and published by . This book was released on 2005 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine the effects of whole-body vibration on electromechanical delay and vertical jump performance. Twenty college aged subjects participated in 10 intervals of whole-body vibration (WBV) at a frequency of 26 Hz and amplitude of 5 mm. Each interval consisted of 60 s of WBV in a half-squat followed by 60 s of rest. After 5 intervals, subjects had 6 min of rest before the final 5 intervals. Each subject also participated in the control which included the same 10 intervals in a half-squat without the WBV. Tests were conducted to assess electromechanical delay (EMD) and vertical jump at baseline, during the 6 min rest period and immediately after the treatment and control. EMD was measured using tibial nerve stimulation and a force plate. EMD was recorded as the lag time between the initiation of gastrocnemeus stimulation and plantar flexion force production. Vertical jump was measured using a force plate and subjects2 flight time. The factorial ANOVA results showed no differences between groups, the control and WBV treatment, for both EMD (F (2, 38) = 1.385, p = 0.263) and vertical jump (F (2, 38) = 0.040, p

Download or read book Effect on the Inter contraction Rest Interval on Muscle Fatigue Curve Parameters written by Etsuo Kurimoto and published by . This book was released on 1959 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Dynamic Exercise on Fatiguing Isometric Exercise and the Assessment of Changing Levels of isometric Component written by Alexander R. Lind and published by . This book was released on 1975 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Whole Body Vibration on Exercise induced Muscle Damage and Delayed onset Muscle Soreness written by Ryan Darin Magoffin and published by . This book was released on 2016 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current scientific evidence suggests that when whole body vibration (WBV) is used as a warm-up prior to performing eccentric exercise, delayed-onset muscle soreness (DOMS) is mitigated and strength loss recovers faster. These benefits were observed primarily in nonresistance-trained individuals. The aim of this study was to determine if WBV could mitigate soreness and expedite strength recovery for resistance-trained individuals when used as a warm-up prior to eccentric exercise. Thirty resistance-trained males completed 300 maximal eccentric contractions of the quadriceps after warming up with (WBV) or without (CON) WBV. Both CON and WBV experienced significant isometric (27.8% and 30.5%, respectively) and dynamic (52.2% and 47.1%, respectively) strength loss immediately postexercise. Isometric strength was significantly depressed after 24 hours in the CON group (9.36% p

Download or read book Effects of a Ten Second Submaximal Isometric Contraction on Heart Rate Blood Pressure and Oxygen Consumption written by Frank Leon Martin and published by . This book was released on 1964 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Whole Body Vibration on Hamstrings Neuromuscular Function in Healthy Individuals written by Cale Chaltron and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Context: Neuromuscular impairments are associated with an increased risk of injury, abnormal biomechanics, and increased risk of osteoarthritis. Metrics such as surface electromyography (EMG) amplitude, electromechanical delay (EMD), antagonist-to-agonist co-activation ratio, peak torque, and rate of torque development (RTD) are important neuromuscular factors modifiable with clinical interventions. The effects of different interventions including whole body vibration (WBV) has been studied and seen to improve these neuromuscular impairments in the quadriceps in both healthy and pathological populations. The effect WBV has on hamstring neuromuscular outcomes has yet to be explored. Objective: To determine if WBV modified neuromuscular function characterized by PT, RTD, EMG amplitude, EMD and antagonist-to-agonist co-activation in the hamstrings and quadriceps of healthy individuals. Design: Crossover. Setting: Laboratory. Participants: 20 healthy individuals. Inclusion: Participants were between 18-30 years old, no history of lower extremity surgery, and meet a priori requirements of a Tegner score ranging between 3-7. Exclusion: Participants with known or suspected pregnancy, diagnosed with malignancy, any type of neuropathy, and history of cardiopulmonary disorder were excluded. Intervention: Independent variables included condition (WBV, control) and time (baseline, immediately post intervention, 20 minutes post intervention). All participants completed 3 extension and 3 flexion maximal voluntary isometric contractions (MVIC) during each time point. Main Outcome Measures: EMG amplitude, EMD, antagonist-to-agonist co-activation, PT and RTD of the hamstrings and quadriceps muscles. Results: WBV decreased ST amplitude and BF amplitude was higher on the WBV day. Additionally, late phase RTD on the WBV day during flexion was lower compared to the control day. No other statistically significant differences in EMG or torque derived outcomes were observed. Conclusion: WBV resulted in a small decrease in hamstring EMG amplitude in healthy individuals. Further research is necessary to establish WBV as a reliable intervention for hamstring neuromuscular outcomes in a pathological population.

Download or read book Effects of Acute Synchronous Whole body Vibration Exercise written by Tom J. Hazell and published by . This book was released on 2010 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, whole-body vibration (WBV) exercise has been gaining interest in the health/fitness community for its reported beneficial outcomes. However, most of these have not been evaluated scientifically leading to some reservation in promoting this new exercise modality. The purpose of this dissertation was to assess the viability of WBV exercise to enhance several selected indices of health. Study 1 demonstrated that the addition of WBV to an isometric semi-squat in young healthy men (n = 8, 25±2.6 y, 177±7.0 cm, 84±12.1 kg) resulted in increases in femoral artery blood flow and leg skin temperature vs the same exercise without vibration (NoV). These increases were seen without concomitant elevations in heart rate and mean arterial pressure suggesting WBV exercise may be a viable training modality for many, perhaps even those with compromised cardiovascular function. Study 2 demonstrated WBV exercise resulted in a greater oxygen consumption both during and following (8 and 24 h) the exercise bout compared to NoV in young healthy men (n = 8, during - 26±2.3 y, 180±8.2 cm, 84±10.1 kg and 5 of the same and 3 others following - 26±3.0 y, 179±8.3 cm, 85±7.3 kg). These increases in oxygen consumed suggest WBV exercise could be a viable training method to induce positive body composition changes with chronic exposure. Study 3 demonstrated that neither an acute bout of WBV nor NoV exercise caused a significant effect on muscle function, soreness, or inflammation in young healthy men (n = 10, 25±3.5 y, 179±7.2 cm, 81±7.9 kg). These data suggest WBV has no significant deleterious effects on muscle. Study 4 demonstrated that both the WBV and NoV exercise sessions improved insulin sensitivity in young healthy men (n=8, 27±2.4 y, 179±7.7 cm, 83±10.6 kg). These results suggest WBV may be an effective exercise mode for individuals with impaired glucose tolerance or even diabetes. Together these studies demonstrate significant potential health benefit of acute synchronous whole-body vibration exercise and illustrate a need for future mechanistic work determining how exposure to these high frequency low amplitude oscillations produce these benefits.

Download or read book Recovery Rate Parameters from Isometric and Isontonic Muscular Fatigue written by Roy Davis and published by . This book was released on 1963 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exploration of Warm up Protocols on Muscular Fatigue written by Sahil Kapadia and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Muscular dystrophy is a genetically linked myopathy with no cure available. The lack of a cure makes early detection and treatment of muscular dystrophy imperative. When reviewing protocols examining muscular fatigue at submaximal isometric contractions, proper warm-up appeared to be absent and could have caused skewed results and conclusions. This study examines the effects of implementing a warm-up protocol before fatiguing trials. In this study, 10 adult subjects conducted fatiguing protocols with the right rectus at submaximal isometric contractions. The warm-up period included a light walk along with contractions at 20% and 33% of maximal voluntary isometric contraction (MVIC) levels. Active recovery measures were also taken into consideration as subjects conducted the fatiguing protocol to relieve the onset effects of lactic acidosis. The contraction durations with and without warmup were found to be significantly different (p=0.001, t-test). Subjects without warmup had a 73.30 second contraction duration difference between their first and second fatiguing contraction, whereas subjects with warmup had a difference of 5.94 seconds. Future studies may investigate the effects the warm-up on the electromechanical efficiency (EME) and mechanomyography (MMG) frequency relationship.

Download or read book The Effects of Whole Body Vibration on Muscle Activity written by Tom Hazell and published by . This book was released on 2006 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Whole Body Vibration on Delayed onset Muscle Soreness written by Amanda A. Wheeler and published by . This book was released on 2011 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: