Achilles tendinopathy is most often caused by:
- Overuse or repeated movements during sports, work or other activities. In sports, a change in how long, intensely or often you exercise can cause microtears in the tendon. These tears are unable to heal quickly and will eventually cause pain. A change in your environment, such as going from a flat surface to a hill or from a dirt road to a paved road, can also cause these tears.
- Injury from repeated push-offs or a stop-and-go motion. These injuries are common in such activities as running, basketball, tennis or ballet dancing.
Achilles tendon rupture is most often caused by:
- Sudden, forceful motion that stresses the calf muscle. This can happen during an intense athletic activity or even during simple running or jumping, especially in middle-aged adults. A rupture most often occurs in sports such as basketball, racquet sports (including tennis), soccer and softball.
- Overstretching the tendon during any activity when the tendon is already damaged because of Achilles tendinopathy or another condition.
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