Effects of High-Intensity Interval Training in Hypoxia on Taekwondo Performance

Purpose: To evaluate the effects of a 6-week taekwondo-specific high-intensity interval training (HIIT) in simulated normobaric hypoxia on physical fitness and performance in taekwondoists. Methods: Eighteen male and female black-belt taekwondoists trained twice a week for 6 weeks in normoxia or in hypoxia (FiO2 = 0.143 O2). The HIIT was composed of specific taekwondo movements and simulated fights. Body composition analyses and a frequency speed of kick test during 10 seconds (FSKT10s) and 5 × 10 seconds (FSKTmult), countermovement jump (CMJ) test, Wingate test, and an incremental treadmill test were performed before and after training. Blood lactate concentrations were measured after the FSKTmult and Wingate tests, and a fatigue index during the tests was calculated. Results: A training effect was found for FSKT10s (+35%, P < .001), FSKTmult (+32%, P < .001), and fatigue index (−48%, P = .002). A training effect was found for CMJ height (+5%, P = .003) during the CMJ test. After training, CMJ height increased in hypoxia only (+7%, P = .005). No effect was found for the parameters measured during Wingate test. For the incremental treadmill test, a training effect was found for peak oxygen consumption (P = .002), the latter being 10% lower after than before training in normoxia only (P = .002). Conclusions: In black-belt taekwondoists, hypoxic HIIT twice a week for 6 weeks provides tiny additional gains on key performance parameters compared with normoxic HIIT. Whether the trivial effects reported here might be of physiological relevance to improve performance remains debatable and should be tested individually.

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The acute physiological and perceptual effects of recovery interval intensity during cycling-based high-intensity interval training

European Journal of Applied Physiology ◽

10.1007/s00421-020-04535-x ◽

2020 ◽

Author(s):

Christopher R. J. Fennell ◽

James G. Hopker

Keyword(s):

Oxygen Consumption ◽

High Intensity ◽

Lactate Threshold ◽

Interval Training ◽

Peak Oxygen Consumption ◽

High Intensity Interval Training ◽

Active Recovery ◽

Recovery Interval ◽

High Intensity Interval

Abstract Purpose The current study sought to investigate the role of recovery intensity on the physiological and perceptual responses during cycling-based aerobic high-intensity interval training. Methods Fourteen well-trained cyclists ($$\dot{V}{\text{O}}_{{{\text{2peak}}}}$$ V ˙ O 2peak : 62 ± 9 mL kg−1 min−1) completed seven laboratory visits. At visit 1, the participants’ peak oxygen consumption ($$\dot{V}{\text{O}}_{{{\text{2peak}}}}$$ V ˙ O 2peak ) and lactate thresholds were determined. At visits 2–7, participants completed either a 6 × 4 min or 3 × 8 min high-intensity interval training (HIIT) protocol with one of three recovery intensity prescriptions: passive (PA) recovery, active recovery at 80% of lactate threshold (80A) or active recovery at 110% of lactate threshold (110A). Results The time spent at > 80%, > 90% and > 95% of maximal minute power during the work intervals was significantly increased with PA recovery, when compared to both 80A and 110A, during both HIIT protocols (all P ≤ 0.001). However, recovery intensity had no effect on the time spent at > 90% $$\dot{V}{\text{O}}_{{{\text{2peak}}}}$$ V ˙ O 2peak (P = 0.11) or > 95% $$\dot{V}{\text{O}}_{{{\text{2peak}}}}$$ V ˙ O 2peak (P = 0.50) during the work intervals of both HIIT protocols. Session RPE was significantly higher following the 110A recovery, when compared to the PA and 80A recovery during both HIIT protocols (P < 0.001). Conclusion Passive recovery facilitates a higher work interval PO and similar internal stress for a lower sRPE when compared to active recovery and therefore may be the efficacious recovery intensity prescription.

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High-intensity interval training increases SIRT1 activity in human skeletal muscle

Applied Physiology Nutrition and Metabolism ◽

10.1139/h10-030 ◽

2010 ◽

Vol 35 (3) ◽

pp. 350-357 ◽

Cited By ~ 55

Author(s):

Brendon J. Gurd ◽

Christopher G.R. Perry ◽

George J.F. Heigenhauser ◽

Lawrence L. Spriet ◽

Arend Bonen

Keyword(s):

Skeletal Muscle ◽

High Intensity ◽

Human Skeletal Muscle ◽

Citrate Synthase ◽

Interval Training ◽

Peak Oxygen Consumption ◽

Peroxisome Proliferator ◽

Mitochondrial Enzymes ◽

High Intensity Interval Training ◽

High Intensity Interval

The effects of training on silent mating-type information regulator 2 homolog 1 (SIRT1) activity and protein in relationship to peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α) and mitochondrial content were determined in human skeletal muscle. Six weeks of high-intensity interval training (∼1 h of 10 × 4 min intervals at 90% peak oxygen consumption separated by 2 min rest, 3 days per week) increased maximal activities of mitochondrial enzymes in skeletal muscle by 28% to 36% (citrate synthase, β-hydroxyacyl-coenzyme A dehydrogenase, and cytochrome c oxidase subunit IV) and PGC-1α protein (16%) when measured 4 days after training. Interestingly, total muscle SIRT1 activity (31%) and activity per SIRT1 protein (58%) increased despite decreased SIRT1 protein (20%). The present data demonstrate that exercise-induced mitochondrial biogenesis is accompanied by elevated SIRT1 activity in human skeletal muscle.

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Can High Intensity Interval Training Effect Division I College 800/1500m Runnerʼs Performance

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000561088.42609.32 ◽

2019 ◽

Vol 51 (Supplement) ◽

pp. 195

Author(s):

Ffion G. Price ◽

Alana Turner ◽

Benjamin Krings ◽

Hunter Waldman ◽

Harish Chander ◽

...

Keyword(s):

High Intensity ◽

Interval Training ◽

Division I ◽

Training Effect ◽

High Intensity Interval Training ◽

High Intensity Interval

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Effect of High Intensity Interval Training On and Anaerobic Capacity and Fatigue Index of Male Handball Players

International Journal of Physical Education Fitness and Sports ◽

10.26524/1443 ◽

2014 ◽

Vol 3 (4) ◽

pp. 18-23 ◽

Cited By ~ 1

Author(s):

B Chittibabu

Keyword(s):

High Intensity ◽

Anaerobic Capacity ◽

Interval Training ◽

High Intensity Interval Training ◽

Fatigue Index ◽

High Intensity Interval

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The metabolic and performance effects of carbohydrate timing in resistance trained males undergoing a carbohydrate restricted diet

Applied Physiology Nutrition and Metabolism ◽

10.1139/apnm-2020-0830 ◽

2020 ◽

Author(s):

Ben Krings ◽

Hunter Waldman ◽

Brandon D. Shepherd ◽

Matthew J. McAllister ◽

Brent J Fountain ◽

...

Keyword(s):

Body Composition ◽

High Intensity ◽

Bench Press ◽

Interval Training ◽

Peak Oxygen Consumption ◽

High Intensity Interval Training ◽

Restricted Diet ◽

Training Adaptations ◽

Back Squat ◽

High Intensity Interval

The purpose of this investigation was to examine the importance of carbohydrate (CHO) timing while consuming a carbohydrate restricted diet (CRD) and completing a high-intensity exercise program. Eighteen males completed six weeks of training with the first two weeks serving as familiarization. During the final four weeks, subjects were randomized into two groups and completed three days of resistance training and two days of high-intensity interval training, while consuming a CRD (~25%, ~25%, and ~50%, CHO, protein, and fat, respectively). The supplemented (SUPP) group (n=9) ingested 30 g of CHO during exercise and 40 g of CHO immediately after each training session. The non-supplemented (NONSUPP) group (n=9) consumed a non-caloric placebo during exercise. Pre-and post-testing measures included back squat and bench press one-repetition maximums (1-RM), peak oxygen consumption (V̇O2peak), anaerobic power, body composition, fasted glucose, insulin, and total testosterone. Both groups significantly improved back squat and bench press 1-RM, V̇O2peak, and power output (p<0.05), but there were no differences in blood markers or body composition. Our data suggests that CHO timing does not negatively impact training adaptations during a high-intensity exercise regimen when dietary CHO intake is restricted, but that favorable adaptations can be made while consuming a CRD. Novelty: • Carbohydrate restricted dieting has no negative impact on resistance training adaptations • Short term high intensity interval training is effective in increasing peak oxygen consumption

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High-Intensity Interval Training is Associated with Improved Long-Term Survival in Heart Failure Patients

Journal of Clinical Medicine ◽

10.3390/jcm8030409 ◽

2019 ◽

Vol 8 (3) ◽

pp. 409 ◽

Cited By ~ 6

Author(s):

Chih-Chin Hsu ◽

Tieh-Cheng Fu ◽

Shin-Sheng Yuan ◽

Chao-Hung Wang ◽

Min-Hui Liu ◽

...

Keyword(s):

Heart Failure ◽

Survival Rate ◽

High Intensity ◽

Survival Rates ◽

Interval Training ◽

Management Program ◽

Peak Oxygen Consumption ◽

High Intensity Interval Training ◽

Term Survival ◽

High Intensity Interval

This matched-control cohort study explored the effects of high-intensity interval training (HIIT) on left ventricle (LV) dimensions and survival in heart failure (HF) patients between 2009 and 2016. HF patients who underwent the multidisciplinary disease management program (MDP) were enrolled. Non-exercising participants, aged (mean (95% confidence interval)) 62.8 (60.1–65.5) years, were categorized as the MDP group (n = 101). Participants aged 61.5 (58.7–64.2) years who had completed 36 sessions of HIIT were treated as the HIIT group (n = 101). Peak oxygen consumption (VO2peak) and LV geometry were assessed during the 8-year follow-up period. The 5-year all-cause mortality risk factors and overall survival rates were determined in the longitudinal observation. An increased VO2peak of 14–20% was observed in the HIIT group after exercise training. Each 1-mL/kg/min increase in VO2peak conferred a 58% improvement in 5-year mortality. Increased LV end-systolic diameter (LVESD) was significantly (p = 0.0198) associated with increased mortality. The 8-month survival rate was significantly improved (p = 0.044) in HIIT participants compared to non-exercise participants. HF patients with VO2peak ≥14.0 mL/kg/min and LVESD <44 mm had a significantly better 5-year survival rate (98.2%) than those (57.3%) with lower VO2peak and greater LVESD. Both HIIT-induced increased VO2peak and decreased LVESD are associated with improved survival in HF patients.

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