Another niche sport recommendation: unicycling! Good for core, a unique skill, insanely fun. Learning is a test of perseverance. If you're physically talented,

Another niche sport recommendation: unicycling! Good for core, a unique skill, insanely fun. Learning is a test of perseverance. If you're physically talented, advanced skills will keep you engaged. If you're merely able-bodied, you can still learn to ride. A surprising number of people take it up in their 50s and 60s.