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Author: Brianna Roberts
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 78
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Book Description
High intensity interval training has become popular to produce various physiological benefits. There is much controversy over what type of interval training has the greatest effects. Purpose: This study was designed to compare high intensity interval groups to examine levels of post-exercise hypotension (PEH). Methods: Young, healthy volunteers (N=55) performed 24 workout sessions on a stationary bike over an 8 week period. Subjects were randomly placed into three different exercise groups: Tabata, Meyer, and steady state. Tabata (N=21) performed 20 seconds at 170% power output (PO) of VO2 max and 10 second rest for 8 bouts. Meyer (N=15) performed 30 seconds at 100% PO of VO2 max, with 60 seconds active recovery, for a total of 20 minutes. Steady state (N=19) performed 20 minutes of exercise at 90% ventilatory threshold (VT). Blood pressures were measured once a week and multiple times during those sessions. Measurements of PEH were taken 30 minutes after exercise. Results: There were significant differences in systolic blood pressure (SBP) between pre- and post-exercise but no significant differences between the three exercise groups. Averaged over eight weeks, steady state had PEH of 9.1 + 2.17, Meyer showed PEH of 8.3 + 1.83 while Tabata had PEH of 9.1 + 1.55. There was no significant difference in PEH between the weeks. Conclusions: Through this study, we have concluded that PEH occurs in SBP 30 minutes after exercise, regardless of exercise intensity. During the eight week training, PEH remained constant. Previous findings have concluded similar results, including studies involving blood pressure medication.
Author: Brianna Roberts
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 78
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Book Description
High intensity interval training has become popular to produce various physiological benefits. There is much controversy over what type of interval training has the greatest effects. Purpose: This study was designed to compare high intensity interval groups to examine levels of post-exercise hypotension (PEH). Methods: Young, healthy volunteers (N=55) performed 24 workout sessions on a stationary bike over an 8 week period. Subjects were randomly placed into three different exercise groups: Tabata, Meyer, and steady state. Tabata (N=21) performed 20 seconds at 170% power output (PO) of VO2 max and 10 second rest for 8 bouts. Meyer (N=15) performed 30 seconds at 100% PO of VO2 max, with 60 seconds active recovery, for a total of 20 minutes. Steady state (N=19) performed 20 minutes of exercise at 90% ventilatory threshold (VT). Blood pressures were measured once a week and multiple times during those sessions. Measurements of PEH were taken 30 minutes after exercise. Results: There were significant differences in systolic blood pressure (SBP) between pre- and post-exercise but no significant differences between the three exercise groups. Averaged over eight weeks, steady state had PEH of 9.1 + 2.17, Meyer showed PEH of 8.3 + 1.83 while Tabata had PEH of 9.1 + 1.55. There was no significant difference in PEH between the weeks. Conclusions: Through this study, we have concluded that PEH occurs in SBP 30 minutes after exercise, regardless of exercise intensity. During the eight week training, PEH remained constant. Previous findings have concluded similar results, including studies involving blood pressure medication.
Author: Paulo Farinatti
Publisher: Frontiers Media SA
ISBN: 2889760774
Category : Science
Languages : en
Pages : 99
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Book Description
Disclosure statement: Topic Editor Linda Pescatello is a scientific consultant for Aytu BioScience. All other Topic Editors declare no competing interests with regards to the Research Topic subject.
Author: Cynthia Furmanek
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 100
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Book Description
Author: Courtney Verona Farland
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 64
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Book Description
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.
Author: Jeff Schuette
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 76
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Book Description
The purpose of this study was to compare the effects of two high intensity interval training (HIIT) protocols and a steady-state protocol on anaerobic capacity after 8 weeks of training. Fifty-five untrained college-aged subjects (17 male, 38 female) completed this 8-week training study. The subjects were randomly assigned to one of three training protocols (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 30 seconds at 100% of the PPO at VO2max, with 60 seconds of active rest at an output that made the average of the intervals equal to 90% of ventilatory threshold. This was repeated 13 times for a total of 20 minutes of exercise. Each subject completed 24 sessions of their respective training protocol. Pre and post-test Wingate anaerobic tests (WAnT) were used to assess the changes in peak power output (PPO), mean power output (MPO), and rate to fatigue. There were significant improvements in PPO (steady-state=+6.7%, Tabata=+9.1%, Meyer=+4.4%), PPO/kg (steady-state=+7.8%, Tabata=+8.5%, Meyer=+5.1%), MPO (steady-state=+3.4%, Tabata=+8.1%, Meyer=+9.8%), and MPO/kg (steady-state=+4.3%, Tabata=+6.8%, Meyer=+6.1%) in all three training groups (p
Author: Laursen, Paul
Publisher: Human Kinetics
ISBN: 1492552127
Category : Sports & Recreation
Languages : en
Pages : 672
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Book Description
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.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The purpose of this study was to investigate the role exercise intensity plays in reducing body weight and percent body fat in overweight women. Subjects were randomized to either a high intensity interval training group (IT) or a lower intensity steady state training group (ST). Each group exercised 3 times per week for 8 weeks and expended 300 kcal per exercise session. VO2max, body composition, and resting metabolic rate (RMR) were measured pre and post training. RMR was measured after exercise at week 2 to see if intensity levels affected RMR. VO2max and body composition improved in IT but not in ST. Neither group showed a change in RMR from pretest to posttest; however, IT had an increase in RMR 24 hours post-exercise whereas ST did not. These findings show that high intensity interval exercise produces improvements in body composition, fitness, and acute RMR compared to low intensity steady state training.
Author: Olivier Girard
Publisher: Frontiers Media SA
ISBN: 2889454061
Category :
Languages : en
Pages : 169
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Book Description
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.
Author: Michelle M. Harbin
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 96
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Book Description
The aim of this study was to investigate the correlation between improvements in aerobic and anaerobic power with various acute physiological responses, including blood lactate accumulation (HLa), percent heart rate reserve (%HRR), Rating of Perceived Exertion (RPE), session RPE (sRPE), and the training impulse (TRIMP) during high intensity interval training (HIIT) compared to moderate intensity interval training and continuous training. Fifty-five subjects aged 18 to 29 completed a pre and post VO2max and Wingate test on the cycle ergometer. Subjects completed 24 sessions of either a steady-state exercise control at 90% of the power output (PO) at the ventilatory threshold (VT), a Meyer interval protocol with 30:60 seconds exercise-to-rest ratio at 100% of peak power output (PPO), or a Tabata interval protocol with 20:10 seconds exercise-to-rest ratio at 170% of VO2max.
Author: Shawn Paul Lacombe
Publisher:
ISBN: 9780494675427
Category :
Languages : en
Pages : 230
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Book Description
Equi-caloric bouts of interval (INT: 5x 2:2 min at 85 and 40% VO 2max) and continuous (21 minutes at 60% VO2max) exercise were performed by 13 older prehypertensive males on separate days, at equivalent times of day, to assess the influence of exercise mode on post-exercise hypotension (PEH). Cardiovascular measures were collected for 30 min pre and 60 min post-exercise. PEH as measured by mean post-exercise systolic blood pressure (SBP) decrease, area under the SBP curve, and minimum SBP achieved, was equivalent after both conditions. SV was significantly reduced and HR was significantly elevated post-exercise after both conditions. No significant reductions in CO or TPR were observed. INT exercise provided a larger perturbation to the autonomic nervous system as measured by Baroreflex sensitivity and Heart Rate Variability. The responses elicited by acute INT exercise, with repeated exposure, may lead to greater improvements in blood pressure regulation than those associated with continuous aerobic training.
