Exercise

How to combine cardio and lifting

By the Liftonic team · November 5, 2026 · 2 min read

Moderate cardio barely affects strength and muscle gains for most people, and it helps your heart, your recovery and your work capacity. Keep most of it easy, and do it after lifting or on separate days.

Does cardio kill gains?

The worry is called the interference effect: endurance training might blunt the adaptations from strength training. Studies do find a small effect, but mostly with large amounts of hard cardio, especially running, done close to lifting sessions. For people doing a few sessions of moderate cardio a week, the effect on muscle size and strength is small or absent.

Meanwhile the benefits are large. Health guidelines for adults recommend at least 150 minutes of moderate activity a week plus two or more days of muscle strengthening. A lifter who skips cardio entirely is leaving half of that on the table.

How much and what kind

• Easy cardio (most of it). Brisk walking, cycling, rowing or swimming at a pace where you can still hold a conversation. Two to four sessions of 20 to 45 minutes a week is a solid base.
• Hard intervals (a little). Short bursts that leave you breathless, such as 6 to 10 rounds of 30 seconds hard and 90 seconds easy on a bike. One session a week is plenty for most lifters.

Cycling and rowing interfere less with leg training than running does, because there's less pounding and less of the muscle damage that running downhill and on hard ground causes. Walking barely interferes at all; more on that in a later post.

How to schedule it

1. Separate days work best. Cardio on your rest days from lifting is the cleanest setup.
2. Same day? Lift first. If strength is your priority, do your lifting first while you're fresh, then cardio.
3. Leave a gap if you can. Six or more hours between a hard cardio session and heavy leg training reduces interference further.
4. Keep hard intervals away from heavy leg days. Put them after an upper body session or on their own day.

An example week

Eat for both

Cardio burns extra energy. If you add a lot of it while trying to gain muscle, add some food too, or your weight and your lifts may stall. Keep protein where it should be (see how much protein you need) and watch whether your weekly lifts still move. Liftonic reads your other workouts from Apple Health, so your runs and rides sit next to your lifting in one place.

This post is general education, not medical advice. If an exercise causes pain, stop and talk to a qualified professional.

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