Cardio or strength training: which should you prioritise?

You do not need to choose a lifelong winner. A time-matched exercise trial explains why cardio and strength training answer different goals, and where combining them helps.

Prepared by PoshanSense · AI-assisted educational writing
Our sources and editorial approach · Not clinically reviewed

Supervised US exercise trial and global guidance · Published 2024

You have half an hour and two options: a walk that gets you breathing harder, or some resistance exercise. The internet offers a winner for every goal. Your body has more than one job to do, which is why the most useful answer begins with the goal rather than the equipment.

What does “better” mean for you?

If the question is about sustaining movement, aerobic fitness matters. If it is about lifting, carrying or retaining strength, resistance training matters. A scale reading is a different outcome again. One routine can improve a capability while barely changing weight, and that is not evidence that it failed.

For a general routine, the WHO guidance includes both aerobic activity and muscle strengthening. It also recognises that some activity is better than none. You do not need to postpone movement until you can assemble the perfect mix.

Can you combine them without adding more time?

That is the practical question the CardioRACE trial helps answer. Its combined group did not receive twice as much exercise. All exercise groups had three scheduled hours a week, including warm-up and cooldown. The combined sessions divided the main exercise period between aerobic and resistance work.

After one year, cardio and combined training improved the primary composite score compared with the control group. Their results were similar; the combination was not shown to be superior to cardio. Resistance alone did not significantly improve that particular primary score, although it improved strength and lean body mass. “Not better on this endpoint” is much narrower than “not useful”.

Did blood pressure, cholesterol and glucose all improve?

No. A composite score combines several measurements; it can improve even when each component does not show a statistically clear difference on its own. In this trial, body-fat percentage fell in all exercise groups compared with control, while systolic blood pressure, LDL cholesterol and fasting glucose did not individually show significant between-group reductions.

This matters when a headline compresses the result into “exercise improves every heart marker”. The study did not show that, and it did not count prevented heart attacks. Its contribution is a more useful comparison of how the same available exercise time can be allocated.

What should your next ordinary week look like?

Start with what is accessible: walking, cycling or another aerobic activity you enjoy, plus a form of resistance exercise suited to your abilities. These are options for a routine, not a prescription copied from the trial. The researchers used individually adjusted programmes, trained supervision and regular reassessment; a home session is a different setting.

It can help to ask two separate questions: “Am I regularly moving enough to challenge my stamina?” and “Am I also doing something that challenges my strength?” That is more informative than treating a watch’s calorie estimate as the only score. Your activity may be a walk to work, a bicycle commute or planned exercise; local weather, facilities, disability and time all affect what is repeatable.

Someone already doing plenty of cardio may have a different gap from someone doing only weights. For a beginner, the first useful step may be a manageable increase in either, followed by building the other into the week. The goal is a routine you can sustain, rather than recreating a research schedule overnight.

How far does the trial travel?

The participants were US adults with overweight or obesity and elevated blood pressure; most were White and well educated. The trial included a run-in period to check ability to adhere, supervised exercise and diet counselling shared by all groups. Those features make the comparison informative but limit how directly its results translate to every age, country or unsupervised routine.

NIH funding was reported, with no funder role in the study’s design or analysis. The study’s exact programme is not universal advice. If a condition, injury or symptoms affect what you can do, an appropriately qualified professional can help you choose a safe starting point.

Published 11 October 2026 · Sources checked 11 October 2026. Suggest a correction.