Board Thread:Versus Debates/@comment-34656247-20180726110937/@comment-26107879-20180728004806

Again. Since we don't know what he looked like in his prime, you don't know that. The Hiden techniques were explicitly stated. If a kid who weighs about 145 pounds can do it, I'm sure Hiruzen has enough calories to perform some of them at his prime. The only thing that stopped him at his 70 year old age are Chakra and maybe physical requirements. However, him being younger likely fixed those problem.