As shown in the video above, if the core is weak, the center of the body tends to lean forward. Also, the whole rib cage goes down due to decreased abdominal pressure, which naturally brings the neck and shoulders down and forward, causing the text neck and rounded shoulders.

Once the shoulders are rolled in, the muscles in the back of the shoulders will become stretched and weaken. Since the shoulders are the starting point for the upper extremities, weakness in shoulder muscles can induce overload in the upper and forearm muscles.

Overworked muscles tend to tighten over time, which can cause pain in the elbow and wrist joints. Put simply, weak core and shoulder muscles make the arm/wrist muscles compensate, which can develop into other musculoskeletal conditions.

In addition, if the neck proceeds forward due to a weak core and decreased abdominal pressure, the cervical spine gets misaligned, which increases the probability of affecting the neck disc or nerves. Although it is not directly related to the wrist, studies on tennis/golfer's elbows show that more than 50 percent of people with tennis/golfer's elbows have neck disc or nerve problems in their lower cervical vertebrae.

Therefore, if you have been diagnosed with a neck disc in the past or if you feel numb or sore in other parts of your arm as well as your wrist, it is strongly recommended to do exercises in the 'Routine 5' section of this class.

References

Lee, A. T., & Lee-Robinson, A. L. (2010). The prevalence of medial epicondylitis among patients with c6 and c7 radiculopathy. Sports health, 2(4), 334-336.

Lee, A., & Lee-Robinson, A. (2010). Evaluating concomitant lateral epicondylitis and cervical radiculopathy. The Journal of Musculoskeletal Medicine, 27(3), 111.