We all know that staying active is one of the best ways to maintain our health as we age. But new research shows exercise does something even more remarkable: it helps our muscles clean out damaged proteins that contribute to aging and weakness.
After age 30, inactive adults can lose 3% to 5% of their muscle mass every decade, and that decline typically accelerates after 60. The result isn’t just smaller muscles. It’s reduced strength, a slower metabolism, lower bone density, poorer balance, and a greater risk of injury.
The good news? Much of this decline can be slowed, and even reversed, with the right and consistent exercise.
Exercise Helps Your Muscles Clean House
A fascinating new study from Duke-NUS Medical School discovered a cellular process that may help explain why exercise protects aging muscles. As we get older, damaged proteins accumulate inside our muscle cells, interfering with their ability to function and repair themselves.
Researchers found that exercise activates a protective pathway that helps restore the cells’ natural cleanup and repair processes. Think of it as taking out the cellular trash while keeping the muscle-building machinery running efficiently.
This research offers another promising explanation for something we’ve known for years: regular exercise is considered a very powerful tool for maintaining strength, health, and independence as we age.
1. Strength Train — Your Best Defense Against Muscle Loss
Resistance training is essential for maintaining muscle mass, bone strength, and metabolism. Whether you’re lifting weights, using resistance bands, or doing bodyweight exercises, challenging your muscles tells your body to keep them strong. Aim for three strength-training sessions each week. At F45, our 3 resistance-focused workouts a week are designed to challenge multiple muscle groups while allowing exercises to be modified for each individual’s needs.
2. Get Your Heart Rate Up
Cardiovascular exercise isn’t just good for your heart and lungs. It also improves the function of mitochondria, the tiny energy-producing structures inside your muscles. Walking, cycling, rowing, and interval training all contribute to healthier muscles. Combining cardiovascular exercise with strength training gives you benefits that neither provides alone. That’s one reason I believe so strongly in F45’s combination of strength, cardio, and hybrid workouts.
3. Stay Consistent — Regardless of Your Age
Consistency is CRITICAL. You need to figure out what works for you to stay consistent. You don’t have to lift the heaviest weights or push yourself to exhaustion. The key is challenging your body appropriately, recovering well, and doing it consistently week in and week out, so make it fun! The goal is to stay stronger, healthier, resilient, and more active for all those extra years – our healthspan.
The time to start is now.
Stay strong, live long.
Research reference: Duke-NUS Medical School study, Proceedings of the National Academy of Sciences (2025) — https://doi.org/10.1073/pnas.2508893122
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