Let's say a wild mage appears (again!) and uses magic to increase the molecular bond strength of the muscles, bones and tendons of a random villager. Supposing their musculature, and other tissues, stays the same, aside from the magical effect, of course, would this provoke an increase on overall strength?
Would it translate in increase speed, lifting power, etc? If the buff is enduring or even permanent, how would it relate to the necessary food intake?