August 14th, 2026
Muscle tissue is metabolically active. In response to use during physical activity, muscle cells secrete a range of signals, as a class now called myokines or exerkines. These signals produce overall beneficial effects on cell behavior and tissue function throughout the body. The precise details of this process are still under investigation, and only the major signals are fairly well mapped - a great deal remains to be discovered in terms of exactly how exercise improves function. Here, researchers review what is presently known of this connection between exercise and a slowing of the progression of age-related neurodegeneration. The research community is quite interested in producing exercise mimetic therapies of various sorts, and one approach to that goal is the identification of specific signals or responses to those signals that can be manipulated.
Parkinson's disease (PD) is a progressive neurodegenerative disorder with motor and non-motor symptoms, driven by dopaminergic loss and α-synuclein accumulation. Beyond neurodegeneration, growing evidence highlights skeletal muscle health as a key determinant of prognosis, with sarcopenia and frailty contributing to greater disability, fall risk, and reduced quality of life. This narrative review synthesizes current evidence on the interplay among exercise, muscle status, and exerkine signaling in PD, emphasizing their potential roles in neuroprotection and functional outcomes.
