Exercise May Help Protect the Brain in Parkinson’s Disease

A new review of 129 studies suggests muscle activity may send protective signals to the brain in Parkinson’s disease through exercise-induced molecules called exerkines. The findings point to exercise as a low-cost, practical way to support movement, mood and possibly neuron survival while researchers work out which routines work best.

Why it matters: - Parkinson’s disease is a growing public health challenge as the global population ages. - The review suggests exercise may do more than ease symptoms. It may also help protect dopamine-producing brain cells. - The findings add weight to exercise as a practical, low-cost part of Parkinson’s care when no cure exists. - Sarcopenia, the age-related loss of muscle mass and strength, may worsen frailty, disability, falls and cognitive decline in people with Parkinson’s disease.

What happened: - Researchers led by Dr. Miguel Germán Borda compiled evidence from 129 studies in a narrative review on muscle-brain crosstalk in Parkinson’s disease. - The review was available online on February 25, 2026 and published in Neuroprotection on June 1, 2026. - The paper is titled "Exercise, exerkines, and muscle–brain crosstalk in Parkinson's disease." - The DOI is 10.1002/nep3.70032.

The details: - The review found benefits from aerobic exercise, resistance training, balance training and multimodal exercise. - Walking, jogging, weight lifting, squats, standing on one leg and Tai Chi were among the examples cited. - Regular exercise improved walking, balance, mood, muscle strength, thinking ability and overall quality of life in people with Parkinson’s disease. - Falls and disability decreased. - Muscle contraction during exercise releases chemical messengers called exerkines. - The review identified brain-derived neurotrophic factor, insulin-like growth factor-1, irisin, cathepsin B, myostatin and growth/differentiation factor 15 as important exerkines. - Exerkines travel through the bloodstream and affect the brain, liver, heart and immune system. - The review says exerkines had anti-inflammatory and antioxidant effects on neurons and improved mitochondrial function. - These signals helped dopamine-producing neurons in the substantia nigra survive longer, resist damage and recover from stress. - Exerkines also supported the brain’s ability to adapt and form new connections.

Between the lines: - The review frames muscle as an active endocrine tissue, not just a structure for movement. - That matters because the muscle-brain connection could explain why exercise appears to influence disease biology, not just physical function. - The evidence base still leaves open a key question: which exercise dose, type and exerkine profile delivers the strongest long-term neuroprotective effect. - Current guidelines strongly support early, sustained exercise in Parkinson’s disease, using a mix of aerobic, strength and balance training tailored to the patient.

What's next: - Future research needs to define how much exercise is enough, which exercise types matter most and which exerkines drive the biggest benefits. - Better answers could help turn exercise into a more precise therapeutic tool for Parkinson’s disease. - The review’s authors say more studies are needed to measure long-term neuroprotective effects.

The bottom line: - Exercise may help people with Parkinson’s disease in two ways at once: by improving movement and by sending protective signals from muscle to brain. - The emerging muscle-brain link strengthens the case for keeping patients active early and consistently.