Ive monitored it for years, but never taken T therapy. Im on the low side, as are most endurance athletes. My take- after you clean up your diet, exercise on a normal level (and no, most “endurance training” isn’t “normal”) and you’re still low-T, then therapy is a good option. I worry about the risks of synthetic T, but low-T is no bueno either. Lots of risks on both sides.