What Goes On When You Get a Cramp New thinking is that cramping is more of a neuromuscular problem than a fueling issue, explains Nelson, who co-wrote a review paper on the causes and management of muscle cramps in 2016. Your muscles have protective reflexes that balance their contraction and relaxation, she explains. When were in a fatigued state or when the muscles are overloaded or challenged in a new way, there’s a mismatch in that messaging thats sent to the central nervous system. The end result is that the muscles are over-signaled, or they over-fire, she says. Which feels like a cramp to you. The details are still being worked out on exactly whats going on in the nerve fibers and why some peoples get excited and others dont. We tend to pigeonhole ourselves into thinking theres one specific cause, and we have to appreciate that its complicated, and the risk factors may even vary from person to person, she says. But docs suspect there are some common causes. Shiv Mer / EyeEm – Getty Images

Toe Cramp Cause: The Wrong Shoes Wearing stiff shoes (or any type of heel, by the way) can shut down the activity of your deep foot muscles-the ones that should do the majority of the work in stabilizing your feet. When those muscles get the pink slip, your toes have to work too hard. Hard work equals fatigue which can equal cramps in people who are prone to them. getty images

Toe Cramp Cause: A Tough New Workout When your muscles are overloaded or fatigued, you’re more likely to get cramps. This can be overload from going out too fast in a workout or race, overtraining, or just doing a workout you’re not used to. DaniloAndjus – Getty Images