good rules for stretching
there are alot of factors that influence flexibility
1.)the tightness of your skin
2.)the elasticity of the muscle tissue you are stretching(so use full ROM when you are training)
those are two factors that BB face
when you stretch A.)stretch til you feel tension, not pain B.) hold for 10 seconds C.) do 4 sets each 10-15 seconds
if you stretch to the limit of complete flexibility don't worry about muscle tears because your muscle's spindels will keep you from injury.just stay away from ballistic stretching!!