The effect of age on the VO2max response to high-intensity interval training

Purpose: High-intensity interval training (HIIT) is documented to yield effective improvements in the cardiovascular system and be an excellent strategy for healthy aging. However, it is not determined how age may affect the training response of key components of aerobic endurance. Methods: We recruited 72 males (mean +/- SD, weight = 84.9 +/- 12.9 kg, height = 180.4 +/- 5.8 cm) and 22 females (weight = 76.0 +/- 17.2 kg, height = 171.2 +/- 6.7 cm) from 20 to 70+ yr with a training status typical for their age group and divided them into six decade cohorts. The participants followed supervised training with a targeted intensity of 90%-95% of maximal HR (HRmax) three times a week for 8 wk. Results: After HIIT, all age groups increased (P