Hi Johan, here is something to start with .. the article mentions a few aspects
In the long run - you'll find endurance
https://www.time-to-run.com/training/art...ongrun.htm
hope this is a good starting point
TheEd
In the long run - you'll find endurance
https://www.time-to-run.com/training/art...ongrun.htm
hope this is a good starting point
TheEd