Adherence

Endurance training increases neuromuscular junction (NMJ) size and complexity (branching and AChR area) in young adults, whereas in aged adults, it primarily reverses age-induced expansion and fragmentation.

Exercise affects your nerve-muscle connections differently as you age. In youth, it builds larger, more complex connections. In older age, it works to fix the wear-and-tear (fragmentation) of these connections, bringing them back to a healthier, younger baseline rather than building them larger.