scholarly journals Impairment of Cycling Capacity in the Heat in Well-Trained Endurance Athletes After High-Intensity Short-Term Heat Acclimation

2019 ◽  
Vol 14 (8) ◽  
pp. 1058-1065 ◽  
Author(s):  
Thomas Reeve ◽  
Ralph Gordon ◽  
Paul B. Laursen ◽  
Jason K.W. Lee ◽  
Christopher J. Tyler
Keyword(s):  
High Intensity ◽  
Interval Training ◽  
Heat Acclimation ◽  
Endurance Athletes ◽  
Stress Tests ◽  
High Intensity Interval Training ◽  
Short Term ◽  
High Intensity Interval ◽  
C 50 ◽  
Perceived Strain

Purpose: To investigate the effects of short-term, high-intensity interval-training (HIIT) heat acclimation (HA). Methods: Male cyclists/triathletes were assigned into either an HA (n = 13) or a comparison (COMP, n = 10) group. HA completed 3 cycling heat stress tests (HSTs) to exhaustion (60% Wmax; HST1, pre-HA; HST2, post-HA; HST3, 7 d post-HA). HA consisted of 30-min bouts of HIIT cycling (6 min at 50% Wmax, then 12 × 1-min 100%-Wmax bouts with 1-min rests between bouts) on 5 consecutive days. COMP completed HST1 and HST2 only. HST and HA trials were conducted in 35°C/50% relative humidity. Cycling capacity and physiological and perceptual data were recorded. Results: Cycling capacity was impaired after HIIT HA (77.2 [34.2] min vs 56.2 [24.4] min, P = .03) and did not return to baseline after 7 d of no HA (59.2 [37.4] min). Capacity in HST1 and HST2 was similar in COMP (43.5 [8.3] min vs 46.8 [15.7] min, P = .54). HIIT HA lowered resting rectal (37.0°C [0.3°C] vs 36.8°C [0.2°C], P = .05) and body temperature (36.0°C [0.3°C] vs 35.8°C [0.3°C], P = .03) in HST2 compared with HST1 and lowered mean skin temperature (35.4°C [0.5°C] vs 35.1°C [0.3°C], P = .02) and perceived strain on day 5 compared with day 1 of HA. All other data were unaffected. Conclusions: Cycling capacity was impaired in the heat after 5 d of consecutive HIIT HA despite some heat adaptation. Based on data, this approach is not recommended for athletes preparing to compete in the heat; however, it is possible that it may be beneficial if a state of overreaching is avoided.

Short-term High-intensity Interval Training and The Physiological Stress Response

2011 ◽  
Vol 43 (Suppl 1) ◽  
pp. 905-906
Author(s):  
Michael J. Ormsbee ◽  
Amber W. Kinsey ◽  
Minwook Chong ◽  
Heather S. Friedman ◽  
Tonya Dodge ◽  
...  
Keyword(s):  
Stress Response ◽  
High Intensity ◽  
Physiological Stress ◽  
Interval Training ◽  
High Intensity Interval Training ◽  
Short Term ◽  
Physiological Stress Response ◽  
High Intensity Interval

scholarly journals Short-Term High-Intensity Interval Training on Body Composition and Blood Glucose in Overweight and Obese Young Women

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Zhaowei Kong ◽  
Shengyan Sun ◽  
Min Liu ◽  
Qingde Shi
Keyword(s):  
Body Composition ◽  
Blood Glucose ◽  
Cardiorespiratory Fitness ◽  
Young Women ◽  
High Intensity ◽  
Interval Training ◽  
Moderate Intensity ◽  
High Intensity Interval Training ◽  
Short Term ◽  
High Intensity Interval

This study was to determine the effects of five-week high-intensity interval training (HIIT) on cardiorespiratory fitness, body composition, blood glucose, and relevant systemic hormones when compared to moderate-intensity continuous training (MICT) in overweight and obese young women.Methods. Eighteen subjects completed 20 sessions of HIIT or MICT for five weeks. HIIT involved 60 × 8 s cycling at ~90% of peak oxygen consumption (V˙O2peak) interspersed with 12 s recovery, whereas MICT involved 40-minute continuous cycling at 65% ofV˙O2peak.V˙O2peak, body composition, blood glucose, and fasting serum hormones, including leptin, growth hormone, testosterone, cortisol, and fibroblast growth factor 21, were measured before and after training.Results. Both exercise groups achieved significant improvements inV˙O2peak(+7.9% in HIIT versus +11.7% in MICT) and peak power output (+13.8% in HIIT versus +21.9% in MICT) despite no training effects on body composition or the relevant systemic hormones. Blood glucose tended to be decreased after the intervention (p=0.062). The rating of perceived exertion in MICT was higher than that in HIIT (p=0.042).Conclusion. Compared with MICT, short-term HIIT is more time-efficient and is perceived as being easier for improving cardiorespiratory fitness and fasting blood glucose for overweight and obese young women.

Short-Term High-Intensity Interval Training Reduces Hyperglycemia in Type 2 Diabetics

2010 ◽  
Vol 42 ◽  
pp. 34-35
Author(s):  
Jenna B. Gillen ◽  
Jonathan P. Little ◽  
Zubin Punthakee ◽  
Mark A. Tarnopolsky ◽  
Martin J. Gibala
Keyword(s):  
High Intensity ◽  
Interval Training ◽  
High Intensity Interval Training ◽  
Short Term ◽  
Type 2 Diabetics ◽  
High Intensity Interval

scholarly journals Short-term and Long-term Feasibility, Safety, and Efficacy of High-Intensity Interval Training in Cardiac Rehabilitation

2020 ◽  
Vol 5 (12) ◽  
pp. 1382
Author(s):  
Jenna L. Taylor ◽  
David J. Holland ◽  
Shelley E. Keating ◽  
Michael D. Leveritt ◽  
Sjaan R. Gomersall ◽  
...  
Keyword(s):  
Cardiac Rehabilitation ◽  
High Intensity ◽  
Interval Training ◽  
High Intensity Interval Training ◽  
Short Term ◽  
Safety And Efficacy ◽  
High Intensity Interval

Short-term high-Intensity interval training increases systemic brain-derived neurotrophic factor (BDNF) in healthy women

2019 ◽  
Vol 20 (4) ◽  
pp. 516-524 ◽  
Author(s):  
Iván Rentería ◽  
Patricia C. García-Suárez ◽  
David O. Martínez-Corona ◽  
José Moncada-Jiménez ◽  
Eric P. Plaisance ◽  
...  
Keyword(s):  
Neurotrophic Factor ◽  
High Intensity ◽  
Interval Training ◽  
Brain Derived Neurotrophic Factor ◽  
High Intensity Interval Training ◽  
Short Term ◽  
Healthy Women ◽  
High Intensity Interval

scholarly journals The Effect of Short-Term Wingate-Based High Intensity Interval Training on Anaerobic Power and Isokinetic Muscle Function in Adolescent Badminton Players

Children ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 458
Author(s):  
Duk-Han Ko ◽  
Yong-Chul Choi ◽  
Dong-Soo Lee
Keyword(s):  
Heart Rate ◽  
High Intensity ◽  
Muscle Function ◽  
Anaerobic Power ◽  
Interval Training ◽  
High Intensity Interval Training ◽  
Short Term ◽  
Power Test ◽  
High Intensity Interval ◽  
Knee Muscle

Badminton requires both aerobic fitness and anaerobic ability for high performance. High intensity interval training (HIIT) is a traditional training method for improving fitness. In this study, we investigated whether short-term Wingate-based HIIT is effective for improving anaerobic activity in youth badminton players. Participants included 32 total badminton players in middle school and high school. They were divided into two groups (HIIT and moderate continuous training (MCT)). Training occurred for 4 weeks in total, three times a week, for 30 min each session. A body composition test, isokinetic knee muscle function test (60°/s, 240°/s), Wingate anaerobic power test (30 s × 5 sets), and analysis of heart rate changes were undertaken before and after training. After 4 weeks, body fat decreased in the HIIT group (p = 0.019); they also showed superior anaerobic ability compared to the MCT group. Differences were statistically significant in 3–4 sets (three sets, p = 0.019; four sets, p = 0.021). Regarding fatigue, the HIIT group showed superior fatigue improvement after training and better fatigue recovery ability in 3~5 sets (three sets, p = 0.032; four sets, p = 0.017; five sets, p = 0.003) than the MCT group. Neither group exhibited changes in heart rate during the anaerobic power test after training. Both groups improved in terms of isokinetic knee muscle function at 60°/s with no differences. However, at 240°/s, the HIIT group showed a statistically significant improvement (p = 0.035). Therefore, HIIT for 4 weeks improved the athletes’ performance and physical strength.

scholarly journals Comparative effects of two heat acclimation protocols consisting of high-intensity interval training in the heat on aerobic performance and thermoregulatory responses in exercising rats

PLoS ONE ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. e0229335
Author(s):  
Myla Aguiar Bittencourt ◽  
Samuel Penna Wanner ◽  
Ana Cançado Kunstetter ◽  
Nicolas Henrique Santos Barbosa ◽  
Paula Carolina Leite Walker ◽  
...  
Keyword(s):  
High Intensity ◽  
Interval Training ◽  
Heat Acclimation ◽  
Aerobic Performance ◽  
High Intensity Interval Training ◽  
Thermoregulatory Responses ◽  
High Intensity Interval
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