I still play at my advanced age in the slow pitch leagues, where the fences are set at 300 feet. Mostly, guys over 70 don't hit the ball out and few over 75 can. Those age groups use hotter bats. The younger guys have more bat speed, hence power, and use restricted bats to keep the HR's down some. A lot are kind of heavy so it is nice to see ones who keep in great shape and can still run well.
I watched a co-ed league the other night and saw a young woman on a team that could have been a model. Probably 25 and very athletic. She hit to the fence and made great contact every time, Very good speed and I witnessed her run down a long drive over her head. She was every bit as any of the young men playing except for ultimate power, but she probably was 50 pounds lighter than the big hitters. I didn't talk to her but presume she was from some college fast pitch league finding her ownly competition in the co-ed league. This was also in NC in the mountains.