>>12034281A good deal of your strength comes from your central nervous systems ability to activate muscle fibers. When you start training, you're not only building muscle mass but also training your CNS to be more efficient.
You could ask /fit/ about this.
I don't know what causes tard strength, if it's even real and not just the shock that some pussy got when he picked on the handycap guy and got surprised when the guy was much stronger than him. If it is real and the guy isn't jacked then it can only be the CNS