Key result
A 12-week combined exercise training program significantly increased peak oxygen consumption and improved vagal-related heart rate variability in obese sedentary young men compared to an inactive control group.
Why the study?
The causal link between changes in adiposity indices and cardiorespiratory fitness and alterations in cardiac autonomic function remained unclear.
Does a 12-week combined exercise training program improve heart rate variability, adiposity, and cardiorespiratory fitness in obese young men?
RCT (n=20)
Randomly assigned (1:1)
No
Does a 12-week combined exercise training program improve heart rate variability, adiposity, and cardiorespiratory fitness in obese young men?
A 12-week combined exercise program improves heart rate variability, cardiorespiratory fitness, and adiposity in obese young men, with changes in autonomic function correlating with fitness and adiposity improvements.
Answers are grounded in this paper and cite their sources.
Supports prescribing combined exercise to improve fitness and vagal tone in obese young men; extends RCT evidence on autonomic benefits.
Although the influence of adiposity indices and cardiorespiratory fitness (CRF) on heart rate variability (HRV) has been demonstrated extensively, the causal link between the changes in adiposity as well as in CRF and the alterations in cardiac autonomic function is unclear. Thus, this study aimed to assess the correlation between the changes in adiposity and CRF and the alterations in HRV after 12-week exercise training. Twenty obese sedentary men aged 20.5 1.2 years were randomly assigned into 2 groups (n= 10 each): the control (CG) and the exercise group (EG). The EG trained 60 min of combined aerobic, anaerobic and strengthening exercise, 4 sessions/wk for 12 weeks, whilst the CG remained relatively inactive. Measurements of resting HRV, body composition, and peak oxygen consumption (VO2peak) were obtained at baseline and after the 12-week training program. Compared with CG, the exercise training significantly reduced adiposity indices and improved vagal-related HRV variables and VO2peak. Significant correlations were observed between changes in HRV variables and adiposity indices and VO2peak changes.
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Phoemsapthawee et al. (2019) conducted an RCT in Obesity (n=20). Combined exercise training program vs. Inactive control was evaluated on Peak oxygen consumption (VO2peak) at 12 weeks (mL/kg/min) (p=<0.01). A 12-week combined exercise training program significantly increased peak oxygen consumption and improved vagal-related heart rate variability in obese sedentary young men compared to an inactive control group.
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