It's not caused by any particular movement - so no, doing full range flies isnt tearing your skin.
They're caused by rapid growth in a time period shorter than the elasticity of the skin can keep up with.
Oils dont help. Their effects are far too superficial. The only thing that will help is being lean.
Quote (Excusemem8 @ Nov 3 2016 05:50pm)
stretch marks are tears in your skin. They will never go away. They will fade however. creston does cheerleading
lol