Going to be turning 40 here and I'm in decent shape but want to get back to my mid-20 shape. I've lifted fairly steadily over most of my life and always played sports outside of the last 10 years. I'm starting to play softball and covering most of the outfield since most the guys are in their 60s. I've been running but been reading that I'm not really doing myself any favors. So want is a better option than running as I want to keep my cardio up as it's nice to be able to still sprint around the bags and cover a big outfield.