Failing to prepare is preparing to fail -Benjamin Franklin Everybody has a plan 'till they get punched in the mouth -Mike Tyson The above cites nicely illustrate a dilemma when it comes to S&C training (and Probably just about anything in life, but I'll try and stay on-topic here): On the one hand, you simply need a plan. Not having one will inevitably result in chaos.in the best case, your progress will stall. In the worst case, you get hurt. That's why there's a plethora of books on proper periodization and exercise programing. On the other hand, nobody operates in lab conditions. Factors like sleep, nutrition, stress at work and concurrent sport specific training need to be taken into consideration. Trying to PR int he deadlift the day after a hard sparring session or an spontaneous party night isn't a good idea. Now there's always an argument to be made here that while the latter case (the party) can be attributed to a weak wi...