Let the "experts" debate which particular squat to do, if at all, when to add in plyometrics, the best rep and set scheme, when to back off etc and whether to go heavy or light. These are methods. As Emerson stated:
"As to methods there may be a million
and then some, but principles are few.
The man who grasps principles can
successfully select his own methods.
The man who tries methods, ignoring
principles, is sure to have trouble."
First do no harm. Adaptation, overload, progression, specificity are the principles.