Over 60 and needing Testosterone boost

https://shruggedcollective.com/1-quick-way-naturually-increase-testosterone-sleep-w-dr-kirk-parsley-episode-113/
The doctor talks about working with Navy Seals (or some kind of special forces people) and how he found it was really common for them to be low T, mostly because they were sleep deprived and physically stressed.
He's got some pointers on how to increase T naturally.
Sprinting, and probably other high intensity exercises, done fast, are known to be an excellent way to boost T levels somewhat. AND sprinting is fun!
https://www.ncbi.nlm.nih.gov/pubmed/21849912