For the past 3 to 4 weeks something strange has been happening with my muscles - mainly my pecs, deltoids, lats and quads. Whenever I perform a motion which causes one of these muscles to lengthen they immediately contract, and my movement in haulted momentarily.
It looks really strange when my pec does it - you can see each of the muscles contract, it kinda looks like a wave of contractions. Has anyone ever had an experience like this? And if so, what did you do about it? What causes this?
Thanks in advance for any help you can give.