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The Effects of a Single Session of High Intensity Functional Training on Energy Expenditure, [VO.sub.2], and Blood Lactate

High intensity functional training (HIFT) provides a potential option to meet public exercise recommendations for both cardiorespiratory and strength outcomes in a time efficient manner. To better understand the potential for HIFT as an exercise approach, energy expenditure (EE) and relative intensi...

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Published in:Journal of sports science & medicine 2022-12, Vol.21 (4), p.545
Main Authors: Smith, Leslie E, Guilder, Gary P. Van, Dalleck, Lance C, Harris, Nigel K
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description High intensity functional training (HIFT) provides a potential option to meet public exercise recommendations for both cardiorespiratory and strength outcomes in a time efficient manner. To better understand the potential for HIFT as an exercise approach, energy expenditure (EE) and relative intensity need quantifying. In thirteen sedentary men and women with metabolic syndrome (MetS), we used both indirect calorimetry and blood lactate levels to calculate EE of a single session of HIFT. The HIFT session included four, 6-minute sets of consecutive functional exercises. Examples of the exercises involved were squats, deadlifts, suspension rows, suspension chest press, and planks. Intensity is described relative to individual ventilatory thresholds. The total group EE was 270.3 [+ or -] 77.3 kcal with approximately 5% attributed anaerobic energy production. VO2 ranged between 88.8 [+ or -] 12.3% and 99 [+ or -] 12% of the second ventilatory threshold (VT2), indicating a vigorous effort. After each work interval, peak blood lactate ranged between 7.9 [+ or -] 1.9 and 9.3 [+ or -] 2.9 mmol, and rate of perceived exertion between 6.9 [+ or -] 1.0 and 8.7 [+ or -] 0.8 arbitrary units from 1-10. These were achieved in approximately 46 minutes of exercise per participant. In conclusion, HIFT elicits the energy expenditure and effort requisite to result in the adaptive responses to produce the known suite of benefits of exercise for individuals with MetS. Key words: Acute exercise, ventilatory threshold, metabolic syndrome.
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subjects Bioenergetics
Energy metabolism
Health aspects
High intensity interval training
Lactates
Oxygen consumption
Oxygen consumption (Metabolism)
Physiological aspects
title The Effects of a Single Session of High Intensity Functional Training on Energy Expenditure, [VO.sub.2], and Blood Lactate
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