Police officers and firefighters are your best comparison set. Although their jobs are dangerous, most of their long-term damage comes from the pounding associated with running, falling, jumping, and climbing. And especially carrying gear in awkward places at heavy loads. Almost every cop I know, retired or active with more than a few years, has back problems. Real back problems, not just general soreness.
In terms of fights, cops who wear body armor do tend to fare better than those who don't. Nonetheless, young cops who decide to be old cops quickly determine that standing toe-to-toe with anyone, even a less capable opponent, rapidly ages the body. Hence, disengagement, multiple officers piling on, nightsticks, pepper spray, and guns.
Whoever the superhero would be would need to learn how to disable their opponent quickly or keep a distance and not use their body to defeat their opponent. And they would need to minimize jumping, climbing, and falling injuries, and running without warming up and (counter-productively), without boots.
In terms of fights, cops who wear body armor do tend to fare better than those who don't. Nonetheless, young cops who decide to be old cops quickly determine that standing toe-to-toe with anyone, even a less capable opponent, rapidly ages the body. Hence, disengagement, multiple officers piling on, nightsticks, pepper spray, and guns.
Whoever the superhero would be would need to learn how to disable their opponent quickly or keep a distance and not use their body to defeat their opponent. And they would need to minimize jumping, climbing, and falling injuries, and running without warming up and (counter-productively), without boots.