Calf Strain or Tennis Leg

What is a calf strain?

A strain is a stretch or tear of a muscle or tendon. People commonly call such an injury a “pulled” muscle. A calf strain is an injury to the muscles and tendons in the back of your leg below your knee.

How does it occur?

A strain of your calf muscles can occur during a physical activity where you push off forcefully from your toes. It may occur in running, jumping, or lunging.

What are the symptoms?

A calf muscle strain may cause immediate pain in the back of your lower leg. You may hear or feel a pop or a snap.

You may get the feeling that someone has hit you in the back of the leg. It is hard to rise up on your toes. Your calf may be swollen and bruised.

How is it diagnosed?

Your healthcare provider will examine your lower leg. Your calf muscles will be tender


To treat this condition:

  • Put an ice pack, gel pack, or package of frozen vegetables, wrapped in a cloth on the area every 3 to 4 hours, for up to 20 minutes at a time.
  • You could also do ice massage. To do this, first freeze water in a Styrofoam cup, then peel the top of the cup away to expose the ice. Hold the bottom of the cup and rub the ice over the calf for 5 to 10 minutes. Do this several times a day while you have pain.
  • Raise your leg on a pillow when you sit or lie down.
  • Use an elastic bandage around your calf as directed by your provider.
  • Use crutches, if it is too painful to walk.
  • Take an anti-inflammatory medicine such as ibuprofen, or other medicine as directed by your provider. Nonsteroidal anti-inflammatory medicines (NSAIDs) may cause stomach bleeding and other problems. These risks increase with age. Read the label and take as directed. Unless recommended by your healthcare provider, do not take for more than 10 days.
  • You may have physical therapy, which may include treatment of the muscle tissue by a therapist using ultrasound or muscle stimulation.
  • Your healthcare provider or therapist may tape the injured muscles while they are healing to help you to return to athletic activities.
  • Follow your provider’s instructions for doing exercises to help you recover.
  • After you recover from your acute injury, use moist heat for 10 to 15 minutes at a time before you do warm-up and stretching exercises. Do not use heat if you have swelling.

While you are recovering from your injury, you will need to change your sport or activity to one that does not make your condition worse. For example, you may need to swim instead of run.

How long will the effects last?

The length of recovery depends on many factors such as your age, health, and if you have had a previous calf injury. Recovery time also depends on the severity of the injury. A mild calf strain may recover within a few weeks, whereas a severe injury may take 6 weeks or longer to recover. You need to stop doing the activities that cause pain until the muscle has healed. If you continue doing activities that cause pain, your symptoms will return and it will take longer to recover.

When can I return to my normal activities?

Everyone recovers from an injury at a different rate. Return to your activities depends on how soon your calf recovers, not by how many days or weeks it has been since your injury has occurred. In general, the longer you have symptoms before you start treatment, the longer it will take to get better. The goal of rehabilitation is to return you to your normal activities as soon as is safely possible. If you return too soon you may worsen your injury.

You may safely return to your activities when, starting from the top of the list and progressing to the end, each of the following is true:

  • You have full range of motion in the injured leg compared to the uninjured leg.
  • You have full strength of the injured leg compared to the uninjured leg.
  • You can walk straight ahead without pain or limping.

How can calf strains be prevented?

Calf strains are best prevented by warming up properly and doing calf-stretching exercises before your activity. This is especially important if you are doing jumping or sprinting sports.

Calf Strain Exercises


You can start gently stretching your calf muscle with the towel stretch right away. Make sure you feel only a gentle pull and not a sharp pain in your calf while you are doing the stretch.

Wearing a quarter to half-inch heel lift in each shoe might reduce your pain as you start to recover from your injury. You can purchase heel lifts at most pharmacies. You can stop using the heel lift when you have no pain while walking.

  • Towel stretch: Sit on a hard surface with your injured leg stretched out in front of you. Loop a towel around your toes and the ball of your foot and pull the towel toward your body keeping your leg straight. Hold this position for 15 to 30 seconds and then relax. Repeat 3 times.

After you can do the towel stretch easily, you can start the standing calf stretch.

  • Standing calf stretch: Stand facing a wall with your hands on the wall at about eye level. Keep your injured leg back with your heel on the floor. Keep the other leg forward with the knee bent. Turn your back foot slightly inward (as if you were pigeon-toed). Slowly lean into the wall until you feel a stretch in the back of your calf. Hold the stretch for 15 to 30 seconds. Return to the starting position. Repeat 3 times. Do this exercise several times each day.

After a couple days of stretching, you can begin strengthening your calf and lower leg muscles using elastic tubing as described in the next exercise.

  • Resisted ankle plantar flexion: Sit with your injured leg stretched out in front of you. Loop the tubing around the ball of your foot. Hold the ends of the tubing with both hands. Gently press the ball of your foot down and point your toes, stretching the tubing. Return to the starting position. Do 2 sets of 15.

You may do the last 4 exercises when you can stand on your toes without pain.

  • Heel raise: Balance yourself while standing behind a chair or counter. Using the chair or counter as a support to help you, raise your body up onto your toes and hold for 5 seconds. Then slowly lower yourself down without holding onto the support. (It’s OK to keep holding onto the support if you need to.) When this exercise becomes less painful, try lowering yourself down on the injured leg only. Repeat 15 times. Do 2 sets of 15. Rest 30 seconds between sets.

You can challenge yourself by standing on just your injured leg as you do this exercise.

  • Single leg balance: Stand without any support and try to balance on your injured leg. Keep standing on the one leg for 30 seconds. Repeat 3 times. Begin with your eyes open and then try to do the exercise with your eyes closed. When you have mastered this, try doing the exercise standing on a pillow.
  • Nose touch: Stand on one leg facing a wall. Stand 4 inches from the wall. Keep your body and leg straight. Slowly lean forward, trying to touch your nose to the wall and then return to the starting position. Make sure you do not bend forward at your waist. Do 2 sets of 15.
  • Wall jump: Face a wall and place a piece of masking tape about 2 feet above your head. Jump up with your arms above your head and try to touch the piece of tape. Make sure you do a “spring” type of motion and try to land softly on your feet. As the exercise gets easier, jump on just your injured leg. Do 2 sets of 15.

Another good exercise is hopping. You can start at one end of the room and try to hop as high as you can across the room on one foot. Jumping rope is also a good exercise.