Six weeks of aerobic continuous and interval training under hypoxia improved 400-m time trial records (-20.41 vs. -7.91 s) compared to normoxic training in amateur male swimmers.
RCT (n=20)
Does six weeks of aerobic continuous and interval training under hypoxia improve endurance exercise performance, hemodynamic function, and autonomic nervous system function in amateur male swimmers?
Six weeks of hypoxic aerobic and interval training improves endurance performance, hemodynamic function, and autonomic nervous system function in amateur male swimmers compared to normoxic training.
Absolute Event Rate: -20.41% vs -7.91%
Hypoxic training is often performed by competitive swimmers to enhance their performance in normoxia. However, the beneficial effects of aerobic continuous and interval training under hypoxia on hemodynamic function, autonomic nervous system (ANS) function, and endurance exercise performance remain controversial. Here we investigated whether six weeks of aerobic continuous and interval training under hypoxia can improve hematological parameters, hemodynamic function, ANS function, and endurance exercise performance versus normoxia in amateur male swimmers. Twenty amateur male swimmers were equally assigned to the hypoxic training group or normoxic training group and evaluated before and after six weeks of training. Aerobic continuous and interval training in the hypoxia showed a more significantly improved hemodynamic function (heart rate, −653.4 vs. −353.7 beats/30 min; oxygen uptake, −62.45 vs. −16.22 mL/kg/30 min; stroke volume index, 197.66 vs. 52.32 mL/30 min) during submaximal exercise, ANS function (root mean square of successive differences, 10.15 vs. 3.32 ms; total power, 0.72 vs. 0.20 ms2; low-frequency/high-frequency ratio, −0.173 vs. 0.054), and endurance exercise performance (maximal oxygen uptake, 5.57 vs. 2.26 mL/kg/min; 400-m time trial record, −20.41 vs. −7.91 s) than in the normoxia. These indicate that hypoxic training composed of aerobic continuous and interval exercise improves the endurance exercise performance of amateur male swimmers with better hemodynamic function and ANS function.
Kim et al. (Fri,) conducted a rct in Amateur male swimmers (n=20). Aerobic continuous and interval training under hypoxia vs. Aerobic continuous and interval training under normoxia was evaluated on 400-m time trial record change (seconds). Six weeks of aerobic continuous and interval training under hypoxia improved 400-m time trial records (-20.41 vs. -7.91 s) compared to normoxic training in amateur male swimmers.