Power Training After 40: Why Jumping Protects Muscle and Bone

Yes, you should train power after 40: jumping, throwing and lifting with speed. Power fades faster than strength as you age, and in a large 2025 study it predicted survival when strength alone didn't, while heavy lifting plus impact work has built spine bone density in postmenopausal women with low bone mass.

So no, the box jumps and med ball throws in your program are not there to make you feel like a teenager at a sports camp. They're there because they keep you alive and upright. Let's go.

Why does power fade faster than strength as you age?

Because ageing muscle shrinks mostly in the fast-twitch fibres, the ones that produce speed. Those fibres also get less responsive, which weakens force. The slow, steady fibres hang on much better.

The typical yearly losses look like this:

• 0.5 to 1.5% of muscle mass
• 1 to 3% of strength
• 3 to 4% of power

Read that again.... Power goes about three times faster than muscle. Which means you can walk every day, do your little 5 lb dumbbell circuit, and still be losing the exact quality that gets you out of a chair, up the stairs and out of a stumble. Quietly. Every year.

Is muscle power a better predictor of survival than strength?

In the research we have, yes. A 2025 study followed 3,889 adults aged 46 to 75 for a median of 10.8 years. Women with the least relative power had 6.9 times the death risk of the women with the most. Men in the lowest group had 5.9 times the risk.

And here's the part that should change how you train: relative strength was NOT a significant predictor in the same analysis. Power was.

That's why I don't care how slowly and carefully you can push something heavy if you can't move fast when it matters. Power is a survival skill. I'd much rather you're harder to kill than easier to manage.

Can jumping and lifting heavy build bone after menopause?

This is the LIFTMOR trial, and it's my favourite answer to "isn't that dangerous at my age?"

101 postmenopausal women, average age 65, all with osteopenia or osteoporosis. Supervised heavy lifting, 5 sets of 5 at above 85% of their max, plus impact work, twice a week for 8 months.

• Their lower spine bone density went UP 2.9%.
• The light home program group LOST 1.2%.
• Function improved on every measure.
• The only side effect in the whole trial was one minor back spasm.

Women with fragile bones. Lifting heavy. And getting stronger bones and better function. Fragility is a learned belief, not a fact.

The American College of Sports Medicine recommends weight-bearing activity, jumping and resistance training 2 to 3 times a week at moderate to high loads. They're honest that after menopause, bone responds a little less to jumping, and that for adults the realistic goal is mostly keeping the bone you have. Keeping your bone while everyone around you is losing theirs? That's a big win. Take it.

And walking? Walking is great for your health and your blood sugar. It is not enough for your bones. Bones respond to load and impact.

How heavy should you lift: what does 1 to 2 reps in reserve mean?

You finish the set when you could have done 1 or 2 more clean reps. That's it. The last 2 reps should feel HARD.

• If you could have done 5 more, it was too light.
• If your form broke on the last rep, it was too heavy.

You don't need to grind to failure. A 2023 meta-analysis didn't find that training to full failure built more muscle than stopping a little short, and failure costs you more recovery. Close to failure gives your body the signal without wrecking you for the next session.

I'll be honest with you. I did 750+ F45 classes in perimenopause and wondered why nothing was showing. Moving a lot is not the same as giving your body a reason to keep its muscle. Heavy enough, with the last 2 reps hard: THAT'S the reason.

Fuel before you lift: protein plus carbs 1 to 3 hours before. Never lift heavy fasted. If you want the bigger picture on lifting in midlife, read [strength training in perimenopause: what changes](/blog/strength-training-perimenopause-what-changes).

Why do grip strength and balance matter so much?

Grip is a whole-body health signal. In the PURE study of about 140,000 adults across 17 countries, every 5 kg drop in grip strength was linked to about 16% higher risk of death, and grip predicted death better than systolic blood pressure.

Balance and quick stepping are what catch you when you trip. Step training roughly halved the rate of falls in older people. That's why our app retests single-leg balance on each side and your broad jump in weeks 1, 5, 10, 15 and 20. When you're five weeks in and your broad jump has moved, you'll see it in black and white.

Is it too late to start power training at 60, 70 or 80?

Not even close. This is my favourite stack of research, because it kills every excuse:

• Women aged 80 to 89 lifted heavy and FAST for 12 weeks and gained 28% in max strength and 18% in jump height. Safe and well tolerated.
• Adults over 85 gained as much muscle and strength in 12 weeks as 65 to 75 year olds.
• Frail 90-year-olds increased strength by an average of 174% in 8 weeks.

So when you tell me you're "too old to jump", I hear a story you've been told. You can get older AND better, not just less bad. Progressive, coached loading is the safe path at any age.

What does a power and bone week actually look like?

Here's how we build it in PRYME. Same for everyone, at every age:

• 3 heavy lifts a week (optional 4th), last 2 reps hard.
• Power work every week: jumps, med ball throws, swings.
• A deload every 5th week.
• Cardio on top, because you don't have to choose. Doing both strength and cardio is linked to about 40% lower risk of death, and adding cardio didn't reduce muscle growth or max strength.
• Creatine, 3 to 5 g a day with lifting, is part of PRYME. If you have any kidney issues, talk to your doctor first.

For the longevity side of lifting, see [does strength training slow aging?](/blog/does-strength-training-slow-aging).

This isn't medical advice. Your DEXA results, bone medication and HRT are your doctor's call, and if you have sharp pain or pain that changes how you move, stop and see a physio or doctor.

Quick answers

Why are there jumps and med ball throws in my program? Speed and power fade faster than strength because the fast-twitch fibres shrink first. Women with the least power had about 7 times the death risk of those with the most, so we train power every week.

Will lifting heavy help osteoporosis? In LIFTMOR, women with low bone mass who lifted heavy twice a week gained spine density while the light-exercise group lost it. Your lifts and jumps are bone training, and your doctor stays in charge of any bone medication.

Are heavy weights dangerous after 50? LIFTMOR used above 85% of max in women with osteoporosis with one minor side effect, and women in their 80s trained heavy and fast safely. Coached, progressive loading is the safe path.

Do I have to train to failure to build muscle? No. Stopping 1 to 2 reps short worked just as well in the research, and it costs you less recovery.

Is walking enough for my bones? No. Walking is great for health and blood sugar, but bones need heavy lifting and impact too.

Sources. Araújo CGS, et al. Muscle power versus strength as a predictor of mortality in middle-aged and older men and women. Mayo Clinic Proceedings. 2025. Watson SL, et al. High-intensity resistance and impact training improves bone mineral density and physical function in postmenopausal women with osteopenia and osteoporosis: the LIFTMOR randomized controlled trial. Journal of Bone and Mineral Research. 2018. Kohrt WM, et al. American College of Sports Medicine position stand: Physical activity and bone health. Medicine & Science in Sports & Exercise. 2004. Caserotti P, et al. Explosive heavy-resistance training in old and very old adults. Scandinavian Journal of Medicine & Science in Sports. 2008. Marzuca-Nassr GN, et al. Muscle mass and strength gains following resistance exercise training in older adults 65-75 years and older adults above 85 years. International Journal of Sport Nutrition and Exercise Metabolism. 2024. Fiatarone MA, et al. High-intensity strength training in nonagenarians. JAMA. 1990. Leong DP, et al. Prognostic value of grip strength: findings from the PURE study. Lancet. 2015. Okubo Y, et al. Step training improves reaction time, gait and balance and reduces falls in older people. British Journal of Sports Medicine. 2017. Refalo MC, et al. Influence of resistance training proximity-to-failure on skeletal muscle hypertrophy. Sports Medicine. 2023. Momma H, et al. Muscle-strengthening activities are associated with lower risk and mortality in major non-communicable diseases. British Journal of Sports Medicine. 2022. Schumann M, et al. Compatibility of concurrent aerobic and strength training for skeletal muscle size and function. Sports Medicine. 2022. Examine.com. What changes in muscle contribute to a loss of function with aging? (citing Grosicki GJ, et al. 2022).