Tennis players use their quadriceps muscles a lot during a match. The quadriceps, which are located in your thighs, provide power for your tennis swing and help propel you forward. Quadriceps cramps can be caused by muscle fatigue, dehydration or heat exhaustion. Rest, stretching and ice packs can all help alleviate cramping. If your quadriceps cramps worsen or spread to other muscles, consult your physician.
Muscle Fatigue
When you overexert a muscle, such as your quadriceps, it can cause muscle fatigue. Symptoms include muscle weakness, cramping and pain. Prolonged exercise, poor conditioning and over-training increase your risk of muscle fatigue and cramping. A previous injury, such as a muscle strain, that has not completely healed also can increase your risk of muscle fatigue and cramping. So can strength imbalances between your quadriceps and hamstrings.
Dehydration and Electrolyte Imbalances
Excessive sweating, inadequate water intake and poor diet can lead to dehydration and electrolyte imbalances, such as low sodium. Symptoms include muscle cramps, fatigue, dizziness, headache, thirst and dry mouth. Muscle cramps associated with dehydration and low sodium are usually not isolated to one muscle group, but rather will affect several muscle groups. If dehydration and electrolyte imbalances are ignored, you can develop more severe symptoms, including low blood pressure, rapid heartbeat and dry skin.
Heat Exhaustion
Dehydration, electrolyte imbalances and hot weather can lead to heat exhaustion, which is when your body's core temperature is slightly elevated. According to a 2005 article published in the journal "American Family Physician," antihistamines and laxatives can also contribute to heat exhaustion. An elevated core body temperature inhibits your cardiovascular and neurological systems from functioning properly, leading to fatigue, dizziness, muscle cramps and headaches. Muscle cramps associated with heat exhaustion are normally experienced throughout the body and not isolated to one muscle group, such as your quadriceps.
Treatment
If you experience muscle cramps, stop playing tennis immediately to prevent further cramping and injury. Gently stretch and ice your quadriceps to alleviate the cramps. Move to a cool area, drink a sports beverage and eat a piece of fruit to rehydrate and replenish electrolytes. Your physician or athletic trainer may also recommend light massaging of your quadriceps muscles, salt tablets and intravenous therapy. If severe dehydration and heat stroke are suspected, you likely will be admitted to a hospital or medical center for monitoring and further treatments.
Prevention
To prevent cramps, strengthen your quadriceps, stretch before and after exercise and rest at least one day each week. Drink 8 to 10 glasses of water and eat plenty of fresh fruits and vegetables on a daily basis. When playing tennis, drink water or a sports beverage every 15 to 30 minutes to reduce your risk of dehydration. Wear clothing that wicks away moisture, such as cotton, and be careful when playing tennis outside on hot, humid days.
References
- "Journal of Athletic Training"; Influence of Hydration and Electrolyte Supplementation on Muscle Cramps; Alan P. Jung, et al.; 2005
- American Academy of Orthopaedic Surgeons: Muscle Cramps; May 2010
- "Overtraining in Sport"; Chapter 9; W. Ben Kibler, M.D., et al.; 1998
- "High-Performance Coaching"; The Relationship Between Stroke Mechanics and Injuries in Tennis; Todd S. Ellenbecker, D.P.T., M.S., S.C.S., O.C.S., C.S.C.S.; 2006
- MayoClinic.com: Dehydration Symptoms
- "American Family Physician"; Management of Heat Stroke and Heat Exhaustion; James L. Glazer, M.D.; June 2005



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