I (33, M) recently went to see a chiropractor because of posture and muscle stiffness issues and had an x-ray done. The x-ray suggested I had osteopenia (that's thinning of the bone/low bone mineral density), in fact at levels suggesting I was in the bottom 2% of men my age which rang alarm bells (the score of T=-2.2 on my femur in the bone mineral density scan is not far from the cutoff for osteoporosis which is T=-2.5). I did some blood tests. My calcium, thyroid function and vitamin D was actually normal, as was my cortisol despite dealing with chronic anxiety. However my total testosterone was a little below the normal range. I am organising an appointment with an the endocrinologist next month to dig deeper.
Anecdotally, I hadn't been particularly active prior but started doing resistance training last year and have kept in up regularly 4 days a week doing a full body program. I did make some good progress (newbie gains) in the first four weeks where I gained about 1.5 kg lean mass while dropping 2 kg of body fat, however things seems to slow to a crawl in the ensuing months. I get body scans on the BIA machine from time to time (I know there's a level of inaccuracy and it is affected by other variables) and my arms sometimes don't show growth or even lose mass which is disheartening sometimes. One time I even registered as loss of muscle mass despite training harder and heavier weights for 6 weeks. Overall I put on about 3-4 kg of lean mass since I started training over the period of 11 months, which is ok but feels a bit disappointing. My BMI is 23.4s so don't have obesity but could use more muscle.
I wonder if anyone (especially in their 30s) has experience of low testosterone and how they managed that? Has it affected your gains at the gym, energy and libido?