The tendons that connect the forearm muscles to the outer elbow (known as lateral epicondyle) are vulnerable to injury due to their poor blood supply.
Tennis elbow occurs when these tendons are damaged by over-use, especially from repetitive activities (such as hitting a tennis ball).
Aside from tennis, there are a range of activities that can cause lateral epicondylitis:
- Long term or incorrect use of a computer mouse.
- Gardening activities such as using shears.
- Manual work such as carpentry
- Other racquet sports