Whats that jello like feeling after working out mean?

Question

You've done enough, right?

Answer 1

You worked your body too hard, you didn't drink enough water or didn't eat enough that day, or, in some cases, you didn't have the Resistance high enough. I did a spinning class the other day, and my legs felt weak and shaky afterwards, and my instructor said it was because the Resistance was too low.

Answer 2

Not sure about the physiological answer, but that's what I always assumed.