Calf muscle cramps can strike just when you've established a good pace on the treadmill. Because calf cramps occur when you are running or walking, many of the same things that cause cramps when you exercise outdoors also cause cramps when you use a treadmill. Identifying the cause of your calf cramps can help you find the appropriate solution to prevent cramping while exercising.
Lack of Fluids
Not replacing fluids lost through perspiration can cause calf muscle cramps. Fluid level imbalances can affect the ability of your muscles to relax and contract normally. Drinking water or electrolyte solutions can help prevent calf cramping by ensuring that there is enough sodium in your body. If the problem continues despite your increasing fluid intake while using the treadmill, you may need to take calcium or potassium supplements to ensure that your body continues to receive the proper level of electrolytes.
Failure to Stretch
Failure to stretch the muscles before you step on the treadmill can also cause cramps. Warm up and stretch lightly for at least 10 minutes before and after exercise to increase muscle flexibility and reduce cramping. If you do develop a calf muscle cramp, performing leg stretches can help relax the muscle. Once the cramp subsides, it is best to rest your legs for at least an hour to allow for recovery of the muscles.
Holding the Side Rails
Holding on to the side rails of the treadmill or pulling yourself forward by grasping the front bar can alter your natural running position and cause problems, including cramps. Holding the side rails or the front bar can put your body in an awkward position, which can lead to cramping or injuries. The American College of Sports Medicine reports that you are more likely to hold on to the side rails while using a manual treadmill. Because the belt may not move smoothly if you have a manual treadmill, users hold on to the side rails in an attempt to keep the belt moving. This causes an inconsistent pace that can lead to muscle strain.
Other Causes
Cramps are more likely to occur as you age due to normal muscle loss. If you are in your mid-40s or older, stretching is particularly important, as reduced flexibility can lead to cramps. Calf cramps can also occur if you wear old shoes with insufficient cushioning or support when you use the treadmill. Pushing yourself too hard can result in cramps due to muscle fatigue. The American Academy of Orthopaedic Surgeons reports that cramps often develop near the end of intense or prolonged exercise, or four to six hours later. Maintaining the same pace throughout your workout can help prevent calf cramps due to overworked muscles.
