Associated Injury
Arm wrestling puts enormous torque/twist on the upper arm's humerus bone to a degree seen in few other physical activities. Most people's bones are not accustomed to being significantly stressed in this direction, and injuries can occur surprisingly easily. The arm typically fails because of a diagonal break at or below the midpoint between the shoulder and the elbow.
The natural tendency of an inexperienced arm wrestler is to push the hand, wrist, and shoulder in the same coordinated direction, against the force being applied by the opponent. This is how we throw a baseball or hit a tennis ball.
However, turning one's shoulder this way simply adds to the torque already being applied to the humerus by the opponent. US Arm Sports advises of the danger of "letting your shoulder get inside your hand." It is better to pivot your shoulders so that you never look away from your hand.
If the tendons and ligaments are too weak to support the pressure, the muscles can cause a complete tendon blow (pop). Never armwrestle several times in a row. Your Tendons will get injured and possibly stun your growth hormones. However, tendons can be strengthened with many methods. When tendons are in pain, they require blood so they can heal faster. Doctors and arm wrestlers recommend doing rehab (training/therapy, exercising with light weights and many repetitions for 30 – 45 minutes non-stop to pump the blood into arms). Tendons can get bigger with time, although it can be a slow process. Experienced arm wrestlers may have tendons 2 - 4 times bigger than average people.
Read more about this topic: Arm Wrestling
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