Originally Posted by
Wildwood
These are my hobbies and I add a little kayak for a water sport, but gyms are claustrophobic. My apologies for not reading all the posts, if already stated.
In addition to the 'growing old explanation' and the 'rest your body explanation' there is a chance of something out of balance. Check hydration/electrolite + mineral/vitamin balance. For me the answer (if that's what it is?) required changing Dr's twice and a simple blood test that revealed an elevated muscular creatine kinase (CK) level. The feeling for me was similar in a way to excess lactic acid and loss of endurance. Trying to push through the pain for better exercise only made things worse; supposedly to the extent of destroying muscle tissue. Not sure what caused it, but less time with endurance activities has lowered it considerably. No more winter ski patrol or summer wilderness ranger but I can enjoy still enjoy my hobby time with some limitations.
Disclaimer: not a doc, so = see yours, or another, or another.......
Hope you got a full workup and the various myopathies eliminated as causes. My CK is normal. No leg pain during exercise, only after. I always take 15g whey protein before and at least that much immediately after exercise. Have done for many years. There's a study showing that 200 cal. BCAA taken after exercise helped CK levels. No great surprise as that's a heckuva lot.