Q: I’m having serious issues with muscle cramping during sports for several years. It usually starts in my thighs or calves and can spread to my feet when it gets bad. I’ve never had a cramp outside of exercise. I’ve tried every supplement I can think of, stay well-hydrated and drink electrolytes, but nothing seems to help. What could be going on?
A: Muscle cramping during exercise is a frustrating and surprisingly common problem, even among well-conditioned athletes. While dehydration and electrolyte imbalances are often blamed, research shows these are not the only or even the most common causes.
Cramps often occur when muscles become fatigued or overstimulated. Over time, nerves that control the muscle can misfire, triggering a painful, involuntary contraction. This tends to happen more frequently during high-intensity or long-duration activity, especially in hot conditions or when your body is not accustomed to the workload.
If your blood work is normal and hydration has not helped, it may be worth focusing on training and neuromuscular conditioning. Make sure to warm up and stretch regularly, especially the muscle groups most affected. Gradually build intensity and avoid sudden increases in duration or load. Address posture or gait issues, as tightness in the hips or hamstrings can increase cramp risk. Review any medications or supplements that might affect muscle excitability, such as stimulants or diuretics. In some cases, nerve compression or a metabolic muscle disorder may play a role. Keep in mind that adequate hydration prior to activity is equally important as hydration during activity, if not more so!
If cramps persist despite conditioning changes, ask your physician about seeing a neurologist or sports medicine specialist. At the first sign of cramping, gentle stretching and massage can often bring quick relief.
Dr. Jason Spangler is a Sports Medicine Physician with Center for Sports Medicine & Orthopaedics and a member of the Chattanooga-Hamilton County Medical Society.