Causes of Weakness in the Teres Minor and Triceps: The Role of Sarcolemma Dysfunction and ACTN3 Gene Mutations
When people talk about supporting an ACTN3 gene mutation (usually referring to the R577X polymorphism where alpha-actinin-3 protein production is reduced or absent), it’s important to understand that you can’t “fix” a gene variant with supplements — your DNA doesn’t change with nutrition alone. However, certain supplements may help muscle performance, recovery, and biochemical pathways that are relevant for people with ACTN3 variations , particularly if you have less alpha-actinin-3 and rely more on metabolic and recovery pathways. Case report: Muscle weakness can arise from a combination of localized injuries, nerve damage, systemic disorders, and even genetic factors. Two muscles that often experience weakness under these circumstances are the teres minor and the triceps brachii . The teres minor , part of the rotator cuff, plays a key role in stabilizing and externally rotating the shoulder, while the triceps is the primary extensor of the elbow. Both m...