How to Combine Cardio and Strength Training

CONCURRENT TRAINING · STRENGTH AFTER 40

You want stronger muscles and a stronger heart, and you have a limited number of hours. The good news is that the two goals cooperate far better than gym folklore suggests.

For years, lifters have worried that running or cycling would “eat” their strength gains, while endurance fans have worried that lifting would slow them down. If you are trying to fit cardio and strength training into the same week, you deserve a clear answer. This guide explains what the research says about combining the two, where a little care pays off, and how to schedule a week that builds both without wearing you down.

Why your week needs cardio and strength training

The Physical Activity Guidelines for Americans ask adults for both: at least 150 to 300 minutes of moderate aerobic activity each week, plus muscle-strengthening activity on at least two days. Aerobic work conditions the heart, lungs and blood vessels. Resistance training builds and preserves muscle and strength, which become harder to keep as the decades pass.

The American College of Sports Medicine’s 2026 position stand on resistance training, an overview of 137 systematic reviews covering more than 30,000 participants published in Medicine & Science in Sports & Exercise, recommends training all major muscle groups at least twice a week. It also found that the biggest gain comes from moving from no resistance training to any resistance training. As Stuart M. Phillips of McMaster University, one of its authors, put it, “The best resistance training program is the one you’ll actually stick with.” That principle applies just as well to the question of how to blend lifting with cardio.

The interference effect, and what the research found

Exercise scientists call the worry the “interference effect”: the idea that endurance training blunts the muscle and strength gains you would get from lifting alone. The best current answer comes from a 2022 systematic review and meta-analysis in Sports Medicine by Moritz Schumann and colleagues, which pooled 43 studies comparing combined aerobic and strength training with strength training alone.

The results were reassuring. Combined training did not compromise maximal strength or muscle growth compared with strength training on its own. The effects for both were small and not statistically meaningful. The findings did not change significantly with participants’ training status or age, with whether the cardio was running or cycling, or with how many sessions people did each week. For most adults whose goals are health, function and a stronger body, adding cardio does not mean giving up strength.

Where some care pays off: speed and power

There was one exception. Explosive strength, the ability to produce force quickly, was the only outcome that showed a significant blunting when cardio was added. The Schumann review found this effect was more pronounced when aerobic and strength work were done in the same session, and it was not significant when the sessions were separated by at least three hours.

That detail matters more than it might seem. The ability to move quickly helps you catch yourself after a stumble, climb stairs briskly and step off a curb with confidence, which is why our guide to power training recommends it as part of a strength routine. If power work is a priority, give it a fresh start: do your fast lifts, jumps or quick step-ups early in a session, and when you can, put your longer cardio at a different time of day or on a different day.

Which comes first in the same session?

Many people train both in one visit, and order is a fair question. A 2018 systematic review and meta-analysis in the Journal of Sports Sciences looked at trials that compared strength-then-endurance with endurance-then-strength in the same session. Lifting first led to larger gains in lower-body strength, with a pooled difference of about 4 kilograms on a one-repetition maximum. Order made no difference to aerobic capacity, measured as VO2 max.

In practice, that gives you a simple rule. If strength is your main goal, lift first and finish with cardio. If an endurance event is your priority, such as a charity ride or a hiking trip, you can reverse the order on key days. A short warm-up of five to ten minutes of easy cardio before lifting is fine either way. That is preparation, not a full session, and it helps your joints and muscles get ready for load.

Sample weeks for cardio and strength training

There is no single best template. The right week is the one that fits your schedule, your recovery and your goals. Here are three common patterns, each of which meets the guideline targets of two or more strength days and at least 150 minutes of moderate aerobic work.

Pattern	How it works	Best for
Three combined sessions	Monday, Wednesday and Friday: 30 to 40 minutes of full-body strength, then 25 to 30 minutes of cardio; brisk 40-minute walks on two other days	People who prefer fewer, longer gym visits
Alternating days	Strength on Monday and Thursday; about 50 minutes of cardio on Tuesday, Friday and Saturday	Anyone who wants each session to feel fresh
Split days	Strength in the morning and a 40-minute walk or ride in the evening on three days, at least three hours apart, plus one longer weekend walk	People who prioritize power or have flexible schedules

Within each strength session, keep things simple: one exercise each for a squat or leg press, a hinge, a push, a pull and a carry or core move. The 2026 ACSM guidance suggests that loads around 80% of your one-repetition maximum for two to three sets build strength, and about 10 sets per muscle group per week support muscle growth. Our guide to choosing sets and reps translates those numbers into weights you can choose without testing a maximum.

Keep the combination sustainable

The bigger risk for most people is not interference. It is fatigue from stacking too many hard sessions back to back. A few habits keep the mix productive:

• Make most cardio easy to moderate, at a pace where you can still talk, and save harder intervals for one or two sessions a week.
• Avoid placing a hard leg day right before a long run, hike or ride.
• Lower-impact options such as cycling, rowing, swimming or an elliptical are easier on your legs when strength days are close together.
• Protect sleep and take at least one full rest day each week.
• Progress one variable at a time: a little more weight, or a few more minutes, not both in the same week.

If you are new to either type of training, start with two short strength sessions and two or three easy cardio sessions, then build from there. If you have heart disease, diabetes, kidney disease, new symptoms such as chest discomfort or unusual breathlessness, a recent injury or surgery, or you are pregnant, check with your doctor before starting or stepping up your program. For more on the aerobic half of the equation, see our guide to building cardio fitness.