Trust ProSource to fill all your supplement needs! Orders placed before 3pm EST ship same day. Want to speak to a customer representative? Our phones are open M-F 9-5. Click here for more information.
  2. Articles
  3. Burn

BLOG

Burn

by Admin Articles
Burn
A burning sensation in a muscle that is being worked. This sensation is caused by a rapid buildup of fatigue toxins in the muscle and is a good indication that you are optimally working a muscle group.