Increasing VO2max with 103 years? Is it possible?
A Case Report published in Journal of Applied Physiology analyzed how Robert Marchand established the 1-h cycling record (24.25 km) for individuals >100 yr old at 101 yr old.
In order to beat it, he prepared for two years training more than 5000 km per year and he broke his record (26.92 km) and increased his peak power output and VO2max. Conclusion: If you train, you can improve your performance and fitness at any age.