The other day, i decided to challenge myself while running on the treadmill at the gym. mind you they have high end gym machines so i never thought it would be a problem. im now 260lbs and decided to try running at 8mph, which was going great and then it felt like the belt starting either slipping or stopping for a second at a time and it felt like i was going to fall. it was a very uneasy feeling! but once i slowed down it stopped happening. am i too heavy to be running that fast or whats up??
Reason: locked to prevent unnecessary zombie/spam bumps
My gym has one or two machines that do that. The belts are too lose.
Try another machine next time.