Time Course Changes in Confirmed 'True' VO ₂ max After Individualized and Standardized Training

Area of Science:

• Exercise Physiology
• Sports Science
• Cardiorespiratory Fitness

Background:

• Maximal oxygen consumption (VO2 max) is a key indicator of cardiorespiratory fitness.
• Accurate measurement of VO2 max changes following training is crucial for understanding exercise efficacy.
• Previous studies have not consistently used verification protocols to confirm true VO2 max.

Purpose of the Study:

• To compare time course changes in VO2 max following 12 weeks of individualized vs. standardized exercise training.
• To utilize a verification protocol to confirm "true VO2 max" changes.
• To investigate the impact of ventilatory threshold-based intensity prescription on VO2 max.

Main Methods:

• 39 participants were randomized into individualized (ventilatory threshold) or standardized (% heart rate reserve) exercise groups.
• Maximal exercise testing with a verification protocol was conducted at baseline, 4, 8, and 12 weeks.
• VO2 max was measured and analyzed for significant changes over time and between groups.

Main Results:

• The individualized group showed significant VO2 max increases from baseline by week 8 and 12.
• The standardized group demonstrated significant VO2 max improvements at week 8 and 12 compared to baseline.
• Preliminary data suggests a more rapid and potent VO2 max improvement with individualized training, though not statistically significant.

Conclusions:

• Individualized exercise prescription based on ventilatory threshold may lead to faster improvements in VO2 max.
• This study is the first to use a verification procedure to confirm "true VO2 max" changes after exercise training.
• Further research with larger sample sizes is warranted to confirm the superiority of individualized training for VO2 max enhancement.