There could be a lot of reasons. Are you taking any fish oil or joint supps? For some folks one or both of those help. If it is a real concern for you, see a doc, though try to find one who deals with athletes as your family practitioner will probably do little more than prescribe fish oil or a joint supp.
David, Husband, Father, Pastor
(Yasen Miroslav Zavadil)
Getting focused to get better.
"If there is nothing you can improve on, your standards are too low!" - BAMA Strength Coach Scott Cochran
1Co 9:27 But I discipline my body and keep it under control, lest after preaching to others I myself should be disqualified
My training Log