I am also 62 and have spent a lifetime exercising and enjoying sports of all types. One of the real blessings in my life right now is to enjoy the home that we completed just outside of Yellowstone Park. I designed in seven different AV systems each of which excels in something different. This includes a reference Home Theater room, a reference 2 Channel room, a multichannel system for the gym, a house system for the great room, an indoor/outdoor system for the sunroom and outdoor patio/fire pit, a system for the master bedroom, and a system for the massage/fly tying room. This may sound like overkill, but we use every one of these system almost on a daily basis. Also, it wasn't that expensive due to being an AV enthusiast over the course of 40+ years and trying to be creative with all the equipment I managed to collect along the way.
The biggest challenge was to make everything pretty much disappear in each room with virtually no visible wiring. To that end I think we have accomplished that and look forward each day to the adventure of old/new music/films and the beauty of creation. I am thankful now that I refrained from the use of anything addictive, other than obviously being an audiophile.
This is a great hobby and it is worth the effort to stay healthy to enjoy it over a lifetime.