There is definitely such a thing as overtraining. I got my free testosterone down to 15 (reference range=35-155 pg/mL) and my total testosterone down to 96 (ref=250-1100 ng/dL). From histograms from various studies, I hit the 1-percentile of low testosterone as a 35yo male. That's... uh... not good.
This was due to a number of factors: excessive running (the equivalent of ~50-70mi/week), calorie restriction, and possibly carbohydrate restriction. Thankfully symptoms of low T (namely morning erections) resolved ~1month after ameliorating those 3 factors. (For anyone interested, look up "Relative Energy Deficiency in Sport".)
Mileage isn't my goal. Health is.
OP states "I've... invested into my own health", but I'm not convinced.
This was due to a number of factors: excessive running (the equivalent of ~50-70mi/week), calorie restriction, and possibly carbohydrate restriction. Thankfully symptoms of low T (namely morning erections) resolved ~1month after ameliorating those 3 factors. (For anyone interested, look up "Relative Energy Deficiency in Sport".)
Mileage isn't my goal. Health is.
OP states "I've... invested into my own health", but I'm not convinced.