Cardio vs strength training: What works better against ageing? Fitness expert reveals what you should prioritise after 30

Why strength training becomes essential after 30? How to combat muscle loss in your 40s? Why cardio matters for overall health as you age?

In your 30s, you're mostly still coasting on momentum. Your metabolism holds steady, your joints forgive you when you push a little too hard, and you bounce back from a tough session fast.

Best strategy for weight loss: Cardio vs strength (TSquared Lab)

By Tavishi Dogra

Tavishi Dogra is a Deputy Chief Content Producer, Health & Wellness, at Hindustan Times. She has over 9 years of experience writing about fitness, nutrition, and mental well-being, translating medical research and expert insights into practical advice readers can trust.

Career journey and experience
Tavishi began her health journalism journey in 2017, and has since reported for RSTV, Financial Express, Jagran, HT Media Labs and Zee. She joined Hindustan Times to simplify wellness subjects by cutting through jargon.

From decoding health trends and interviewing doctors to testing fitness routines herself, Tavishi always approaches content with one filter: “Will this help someone make a better decision today?”

Subject expertise
With 9+ years tracking India’s health conversations, Tavishi knows the gap between clinical advice and daily life. She knows fads from fundamentals and curates science-backed, expert-recommended solutions.

In fitness, she breaks down bodyweight training, recovery, and posture fixes for desk-bound readers. In nutrition, she translates guidelines into affordable, desi meal tweaks. In mental well-being, she focuses on stigma-free, actionable tools — all backed by research, expert input, and lived context.

Education and professional background
Tavishi holds a Master’s degree in Journalism and Mass Communication and began her career reporting on public affairs for broadcast. Those early years in policy and TV shaped how she writes today: fast, factual, and human-first.

Editorial Philosophy
I write with one single goal: To simplify health in a world full of noise by finding what’s actually doable, safe, and evidence-based for my readers. I test claims against research and user experiences. When all else fails, I speak to the expert who sees 50 patients a day, not the one with the most followers.

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"I get asked this all the time, and the honest answer is it depends on your decade. Cardio and strength both still matter throughout. What changes is what your body actually needs most, and that shifts every ten years or so, whether you're paying attention or not," Fitness expert Sumit Dubey, Founder of Sumit Dubey Fitness (SDF), tells Health Shots.

This is actually the best window to build a strength base, because you can lift hard and bounce back without much drama. "I'd still keep cardio in the mix; two or three sessions a week is plenty, but strength training should be the backbone", says the expert. The muscle you build now is muscle you're borrowing against for the next 30 years.

Is it normal for a 40-year-old to lose muscle mass?

Somewhere in your 40s, things start changing under the hood. Muscle loss accelerates if you're not actively working against it, and this is often when people first notice fat settling around the middle, even though nothing else has changed. This is where strength training earns its keep.

What kills muscle gains the most?

Two or three sessions a week built around the big compound lifts— squats, deadlifts, presses, and rows— will do more for your metabolism and your joints than piling on extra cardio. Your heart still needs cardio, don't get me wrong, but at this stage it's the supporting act, not the main event.

Can bone density be improved after 50?

By your 50s, the conversation changes again, and bone density steps in. Strength training stops being about how you look and starts being about staying upright, protecting you from osteoporosis and falls, and slowing the slow slide toward losing your independence that sneaks up on people in their seventies.

"My advice for this decade: don't ease off strength work; if anything, lean into it harder. Cardio's still non-negotiable, too; lifting weights doesn't let your heart off the hook, but shift some of it to lower-impact options. Walking, cycling, swimming. Your joints will thank you," says the fitness expert.

Can a 70-year-old regain muscle mass?

Here's the thread running through all three decades: strength training becomes more important, not less, as you age. That surprises people, because the cultural instinct is to associate lifting with your twenties and cardio with getting older. It's actually backward. As you get older, you're most at risk of losing muscle and bone, and they don't come back easily once they're gone.

So if you only have time for one thing this week, and you're over 30, make it strength training. Just don't skip cardio entirely; your heart is still keeping score.

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