I had heard that biceps are fastest, lower back recovers the slowest, what is the sd?
Well, the lower back might be regarded as the slowest, but is that more because that it is the slowest, or because it’s harder to work it out and make stronger (a muscle getting stronger is just it repairing itself to a slightly better state after getting damaged from working out.)
And what about the smooth muscle lining the intestines? Seeing as it doesn’t really ever get worked out beyond normal digestion, I would think it’s not used to repairing itself as much as skeletal muscle.
The rate of healing should be about the same in all muscles. Large muscles heal more slowly because of the amount of tissue that needs to be repaired, and the lower back is one of the largest muscle groups in the human body.
The notion that biceps heal the most quickly is probably just a myth perpretated by people who want to believe that it’s OK to do biceps curls every day.