This is one of the fundamental differences between humans and hams.  If a ham wants to do something, it will find every excuse not to, and say "I'll do it tomorrow."  If a human is determined to do something, they will just fucking do it. Didn't work out today?  Do a few pushups before bed.  It's nice outside?  Why not bike to work.  You change your life every day.  The absence of action is just as important as any action.  Not taking care of yourself is a choice, not a default.