Not at all ... that's average, just look at the ages of the top 20 Bodybuilders in the world . You'd be surprised
WoooSHHHHHHHHHHHHHHHHHHHH
Dorian Yates's best years were mid 30's, and he was already a Olympia winner.
Coleman's best years were again late 30's, and he was already firmly cemented in the top spot. By the time he was Kai's age he was dropping in the ranks.
Cutler, again his best years were mid - 30's. He was younger than Kai when he started fading.
Jackson won it in his late 30's. He's doing ok, but will he ever win another Olympia?
Phil Heath, again mid to late 30's best years. He's half a decade younger than Kai.
42 is old in competitive bodybuilding at the Olympia level. Sure, there are older guys that look and feel great, but it's rare that they do anything at the Olympia level, they are usually middle of the pack at best. Jackson and Rhoden are the only guys over 40 that have a chance at being top 3 placers at the Olympia.