Which symptom is commonly associated with sustained elbow flexion?

Sustained elbow flexion often results in numbness and tingling in the fingers due to the position placing pressure on the ulnar nerve, which runs along the inner aspect of the elbow. This nerve can become compressed during prolonged flexion, leading to a condition known as "cubital tunnel syndrome," where symptoms manifest as tingling and/or numbness in the ring and little fingers. The maintenance of the elbow in a flexed position limits the circulation and can irritate or damage the nerve, causing the characteristic sensations in the fingers.

While joint stiffness could occur due to prolonged positions, the specific link between sustained elbow flexion and nerve compression aligns more closely with the sensation of numbness and tingling. Similarly, muscle atrophy results from disuse over a longer period and is not immediately associated with sustained elbow flexion. Constant pain in the shoulder could arise from various factors, but it is not a direct result of the elbow position alone, making numbness and tingling the most characteristic symptom in this scenario.