There are three comments going on at once there: > Sitting still is bad for the back OK. More information on sitting still, it isn't surprising that any actio

There are three comments going on at once there: > Sitting still is bad for the back OK. More information on sitting still, it isn't surprising that any action has both benefits and drawbacks - I couldn't find much quantitative information for any more meaningful comparisons. > How is doing something that you don't want to do strengthening your will power willpower: control exerted to do something or restrain impulses [2] If willpower benefits from practice (which I believe it does) then it would be through using willpower to retrain the impulses to not sit still. > teachers occasionally complained that I was too passive. Passivity is quite distinct from willpower, likely they were referring to a lack of charisma or independence. [2] https://www.google.co.uk/webhp#q=define+willpower https://www.google.co.uk/webhp#q=define+willpower