Short Term HIIT increase VO2max, but can’t decrease Free Fatty Acids in Women Sedentary Lifestyle

Abstract

Previous studies have investigated the effects of high-intensity interval training (HIIT) on cardiorespiratory fitness and body composition in overweight populations. However, short-term effect of HIIT and free fatty acids (FFA) serum in women sedentary lifestyle is not clearly understood. The aim of this study was to investigate the effect of 2-week high intensity interval training on body fat percentage, free fatty acids, and VO2max in overweight sedentary adult women. The fourteen sedentary young women (18–30 years old) randomly divided to control and HIIT groups. The HIIT group performed two-weeks training program, 20 min of repeated 10 s cycling interspersed with 50 s rest intervals per session, four days in a week. The variables were taken before and after intervention. The result showed the VO2max improved significantly (p<0.05) and the change of body fat percentage was decreased significantly (p<0.05) in HIIT compared to control. The FFA levels were raised in HIIT and reduced in control, but they were not significantly different between groups (p≥0.05). The conclusion of this study reveals that the HIIT can be a reliable strategy for countering obesity in the adult population for improving fitness level and lessen body fat percentage. It may cause by increase energy metabolism. However, its underlying mechanism seem not via FFA. Then the further study needs to be conducted to figure out the other metabolic subtances in human body. Keywords: HIIT; VO2max; Free Fatty Acids; SGDs; Healthy Lifestyle

The Influence of High Intensity Interval Training on Improving Physiological Performance and Social Status in a Sedentary Lifestyle: Review of the Literature

“…Lastly, monitoring subjects becomes more convenient as they can remain stationary without switching locations or equipment during training (Hoeger et al, 2019). In the data analysis phase, findings from seven studies (Allen et al, 2017;Gillen et al, 2016;Kong et al, 2016;Polytechnic Institute of Beja (Portugal), 2023;Reljic et al, 2020;Syamsudin et al, 2023;Vella et al, 2017) revealed that research participants exhibited VO2max values as moderate both before and after the intervention period. Additionally, three studies (Astorino et al, 2013;Reljic et al, 2018;Vigriawan et al, 2022) documented an enhancement in VO2max levels from low to moderate subsequent to the prescribed training program.…”

“…In addition, it increased fitness levels by up to 17%. Decreased HR rest after regularly doing HIIT is possible due to the induction of improved stroke volume (Syamsudin et al, 2023). Enhancement of stroke volume will increase plasma volume, thereby increasing myocardial contractility, which will lead to a decrease in HR rest (Vigriawan et al, 2022).…”

“…The chronic effect will be right ventricular hypertrophy, which increases stroke volume so that the heart can pump blood more efficiently. An increase in stroke volume will increase plasma volume, thereby increasing myocardial contractility, which leads to a decrease in HR (Syamsudin et al, 2023).…”

“…This lifestyle is characterized by minimal physical activity, which entails prolonged periods of immobility, often spent in front of screens or engaging with electronic devices (Ma et al, 2019;Mamikutty et al, 2014). In fact, this behavior can increase the risk of health issues, including obesity, cardiovascular ailments, type 2 diabetes, and diminished physical fitness (Syamsudin et al, 2023). To combat this trend, exploring effective strategies for enhancing physical fitness and overall well-being among adults with sedentary lifestyles is imperative.…”