One Devil Fruit Two Powers
After reading 383, i began to wonder the limits of Luffy's DF. He can stretch his body parts and obsorb the impact of any firearms with his DF.
The thing i'm wonder about is Luffy's body strength. The fact that he's just a skinny teenager who became strong because of a DF contradicts with his super human strength. We never see him lift weights and he doesnt have a muscular body. I recall a couple of times in the anime where he singel handedly stopped someone's sword/some kind of melee weapon and crushed rocks or something with his bare hands without using his DF ability.
Does this mean that Luffy's devil fruit no only gave his body elasticity but also super human strength???