#56 Change exercise as you age?

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Dec 2, 2025

Discover how exercise evolves after 50, emphasizing muscle preservation and injury prevention. Learn about the 'aging triad' of muscle loss, bone density changes, and osteoarthritis risks. Running doesn't necessarily worsen knee health, making it a viable option. The conversation highlights strength training's importance and the need for power fiber support through high-intensity activities. Adjusting recovery times plays a crucial role in maintaining fitness, alongside smart activity choices to reduce injury risks. Aging doesn't mean slowing down!

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INSIGHT

Exercise Extends Healthy Years

Exercise prolongs healthy, functional years and protects heart, brain, muscles, and bones.
Preparing for age-related changes early gives you more years of high function.

ANECDOTE

Host Racing At 69 Shows Possibility

Bobby Dubois cites recent endurance events showing remarkable older athletes.
He shares he is 69 and continues to race Ironman events himself.

INSIGHT

Strength Falls Faster Than Muscle

Muscle mass declines ~1–2% per year after age 30 while strength falls faster.
Fast-twitch (type 2) fibers, which provide power, decline disproportionately with age.

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Exercise is the most powerful longevity tool we have, but after 50 the recovery curve, injury risk, and bone/muscle changes mean the smartest plan blends strength, power, impact, and slightly more recovery—so you can train hard without derailing progress.

What we cover

Why this matters now: record-setting older endurance athletes (and I’m racing at 69) show what’s possible—if we train wisely.
The “aging triad”: loss of muscle (especially fast-twitch/power), bone density shifts (sharpest around menopause), and rising osteoarthritis risk.
The injury paradox: the fitter you are, the more a single layoff can cost; preventing setbacks is a longevity strategy.
A practical framework: build strength, protect fast-twitch fibers, add tolerable impact for bone, and consider an extra rest day after hard sessions.

Evidence, in plain English (linked)

Muscle changes: We preferentially lose type-2 (power) fibers with age; quads are especially affected. Training can target this. Review
.
Women & men both lose muscle mass percentage-wise; patterns differ but loss is universal. Same review
.
Bone density: Women can lose ~2–3%/yr at the spine around menopause; men decline more gradually. CDC data brief
.
Running & knees: Long-term cohorts show no higher knee OA in runners vs. non-runners (Stanford cohort
; systematic review, ~14k people
), and even runners with established OA didn’t worsen—and reported less pain. Prospective OA cohort
.
Strength at any age: Even adults 85+ can add ~10% quad size and ~40% leg strength in 12 weeks; heavy strength work is safe when programmed well. Overview
.
Power/fast-twitch support: Short (30–120 s) high-intensity efforts and plyometrics can improve type-2 fiber function and neuromuscular drive in older adults. Narrative review
.
Bones respond to signal: In 80 trials (5,500 postmenopausal women), combined resistance + impact training improved spine and hip BMD regardless of menopause timing or baseline status. Meta-analysis
.
Recovery with age: Some data show more soreness and temporarily lower strength 24–72h post-lifting in middle-aged vs. young adults—supporting a touch more recovery after hard days. Study
.

Practical takeaways

Lift twice weekly
Add brief power: 20–30-second hard intervals or controlled mini-hops/step-downs; keep impact tolerable.
Build bones: pair resistance work with impact (jog/jump rope as tolerated). If you have osteopenia/osteoporosis, get your plan cleared first.
Recover like it matters: if a session is truly hard, consider one extra easy/recovery day.
Audit risk: dial back higher-risk activities that would sideline you for weeks; prevention preserves gains.

If this episode helped, please rate the show and share it with a friend. To get my newsletter with practical, evidence-backed steps for living long and well, visit DrBobbyLiveLongandWell.com.