Different characteristics allow for adaptation in certain sports: having the “ideal” genetics from a strong mother/father can be a big plus, as can having good tendon/bone attachment = good leverage, ideal muscle length, as well as height all add up to someone who may be cut out for a certain physical activity.
The people in the Olympics are considered to be the genetic elite of their sport. This guy could well have one or two of the above physical attributes (or all of them) - meaning he could have the ability to get very strong/he is naturally strong - this is not to say someone without these things can not get strong. it may just take a little more time.
