Did you do a full body workout
? Do you have arthritis
(screen name is "lupus") are you on a "statin" to lower your cholesterol? Do you have any other symptoms- fever
, chills or signs of infection? First time you've done something exertional in a while? Rest, hydrate well and closely observe your symptoms.
Assuming no other concerning symptoms, see your doc if not resolving within 3-4 days.