High-intensity interval aerobic training increased VO2max significantly more than continuous aerobic training (22.5% vs 10.0%; P=0.01) in sedentary men, despite lower volume and time commitment.
RCT (n=42)
Randomly assigned
Absolute Event Rate: 22.5% vs 10%
p-value: p=0.01
PURPOSE: The aim of this study was to compare the effects of time-efficient, low-volume interval exercises on cardiorespiratory capacity and left ventricular (LV) mass with traditional continuous exercise in sedentary adults. METHODS: Forty-two healthy but sedentary male subjects (age 26.5 ± 6.2 yr) participated in an 8-wk, five times per week, supervised exercise intervention. They were randomly assigned to one of three exercise protocols: sprint interval training (SIT, 5 min, 100 kcal), high-intensity interval aerobic training (HIAT, 13 min, 180 kcal), and continuous aerobic training (CAT, 40 min, 360 kcal). Cardiorespiratory capacity (V˙O2max) and LV mass (3T-MRI) were measured preintervention and postintervention. RESULTS: We observed significant (P 0.05). CONCLUSIONS: Our study revealed that V˙O2max improvement with the HIAT was greater than with the CAT despite the HIAT being performed with a far lower volume and in far less time than the CAT. This suggests that the HIAT has potential as a time-efficient training mode to improve V˙O2max in sedentary adults.
Matsuo et al. (Thu,) conducted a rct in Healthy but sedentary (n=42). Sprint interval training (SIT) and high-intensity interval aerobic training (HIAT) vs. Continuous aerobic training (CAT, 40 min, 360 kcal) was evaluated on Cardiorespiratory capacity (VO2max) increase (p=0.01). High-intensity interval aerobic training increased VO2max significantly more than continuous aerobic training (22.5% vs 10.0%; P=0.01) in sedentary men, despite lower volume and time commitment.