The Arm Nobody Trains For Falls

Ask most people what stops a fall and they'll say balance, or maybe leg strength. Almost nobody says arms. But when you actually slip, in real life, off a curb, on a wet floor, your arm often does more of the saving than your legs do.

A 2024 paper walked through why. During a slip, the legs mostly move forward and back. They're not built to catch a sideways loss of balance, which is how most slips actually happen. The arm is. A fast outward arm movement, an abduction, can cut the odds of a fall by more than 200 percent during a slip. Older adults, though, show roughly 36 percent slower arm response compared to younger adults during the same kind of slip, and the paper ties that slowdown to age-related loss of type II muscle fiber in the shoulder (Lee-Confer, 2024, Frontiers in Sports and Active Living).

Type II fibers are your fast-twitch fibers. They're what let you react quickly instead of just steadily. They're also the fibers that fade first as we age, and they fade faster after menopause specifically (McMillian, 2025, Strength & Conditioning Journal). That is the exact fiber type most standard exercise programs barely touch, because standard strength training, slow, controlled, steady tempo, mostly trains the slower fibers instead.

This is where power training comes in, and it's a different thing than strength training even though people use the words interchangeably. Power is how fast you can produce force, not just how much force you can produce. A meta-analysis of power training in older adults found it improved fall-risk-related function, faster Timed Up and Go times, more repetitions on the sit-to-stand test, beyond what standard strength training alone produced (Jiménez-Lupión et al., 2023, Archives of Physical Medicine and Rehabilitation).

So what does power training actually look like for someone with Parkinson's disease or MS? It's still safe, still individualized, still built around your actual ability level. But instead of a slow three-count squat, you might work on rising from a chair as quickly as you safely can. Instead of a static arm raise, you might practice a fast reach out to the side. The goal is training your body to react quickly, not just to hold steady.

We're not saying steady strength training is wrong. It's foundational. But if reacting to a slip is the actual goal, and it is, then reaction speed has to be part of the plan. Most programs stop at strength. We don't.

Curious what power training looks like for your specific situation? Book a free consultation and we'll build it into your plan.

A quick note: this post is educational, not individualized medical advice, and it's not a substitute for an evaluation with a licensed physical therapist or your own physician. Everyone's situation with Parkinson's disease or MS is different, and what's safe and effective for one person may not be for another. If you want to talk through your specific situation, we'd love to hear from you. Book a free consultation