Man Mountain Marko has been shown to have superhuman strength, stamina and sturdiness roughly comparable to, if not slightly exceeding, those of Spider-Man. It has been said that this is a result of steroids and genetic manipulation.
Man Mountain Marko's extraordinary strength, endurance, and toughness are believed to be similar to or even greater than those of Spider-Man. This attribute is attributed to the use of steroids and genetic engineering.