When I do my leg extension, my legs shake pretty bad.. No matter what weight I use, they still shake.
Anyone know why this happens?
I don't no exactly as to why, but im sure if did a search, you would come with some answers. But I think the cause could be many things: Mineral/electrolyte imbalance (calcium/potassium/sodium). Lack of hydration. Very low glycogen. Low blood sugar.
What part of your workout are you doing them? I know that happens to me when I do them at the end of my workouts and my quads are really getting worked hard. Most likely incomplete tetanus in the muscle due to fatigue