Is it possible to stretch scars by lifting heavy weights doing biceps and triceps please? Or does scar tissue not stretch? Thank you so much.
If you are trying to bulk up with weight lifting and steroids, you will gain weight and skin does stretch. Usually, scars do not stretch as much as the skin. If you are trying to tone, your scars will probably not change.
It is possible, but you can slowly increase your heavy weights after the incisions have fully healed after surgery. Scar tissue will never be 100% as strong as your native skin.