How to train for a 5k while lifting

A 5k is short enough that you don't need to give up the gym to get faster. Three well-placed runs a week and a little planning around leg day are enough for most lifters.

By the Strand team · Updated 19 October 2026

Why a 5k suits lifters

Of all the common race distances, the 5k asks the least of your week. You don't need long runs that eat a Sunday morning or mileage that leaves your legs flat for squats. What a 5k does need is some speed, some aerobic fitness and enough running that your legs and lungs are used to it.

That makes it a good first race for someone who mostly lifts, and a good target for a hybrid athlete who wants a running goal without changing their whole programme. The trade-off is that you can't wing the hard sessions. Where you put them matters more than how many miles you run.

The rules for running around lifting

1. Keep most runs easy. Easy means you could hold a conversation. Easy runs build fitness without leaving you too tired to lift.
2. One hard run a week is enough. Intervals or a tempo run once a week does most of the work for a 5k. Two hard runs on top of heavy lifting is where people come unstuck.
3. Keep the hard run away from heavy leg day. Leave at least a day between your interval session and your heaviest squat or deadlift day, in either direction.
4. Hard things first. If you lift and run on the same day, do the more important session first. Easy runs can go after the gym; intervals shouldn't.
5. Build running gradually. Gym strength doesn't fully prepare your feet, shins and calves for repeated impact. Increase running time slowly, even if your lungs feel ready for more.

The three runs that matter

Easy run

Twenty to forty minutes at a relaxed, conversational pace. This is most of your running. If you're new to running, walk breaks are fine; run/walk still counts.

Quality run

Repeated efforts at around your goal 5k pace or a little faster, with easy jogging or walking in between. Examples: 6 × 400 m with 90 seconds' rest, 5 × 800 m with 2 minutes' rest, or 4 × 1 km with 2 to 3 minutes' rest. Warm up with ten minutes of easy running first. Start with fewer repeats than you think and add one every week or two.

Longer easy run

Your longest run of the week, still at an easy pace. For a 5k it doesn't need to be long: 40 to 60 minutes is plenty for most people. It builds the aerobic base that lets you hold pace in the second half of the race.

Sample weeks

Three gym days and three runs

The interval session on Thursday sits two days after the heavy lower-body day and the day after an upper-body session, so your legs are as fresh as they get in this week. Saturday's gym session goes lighter on legs because the long run comes next.

Two gym days and three runs

A good option for the last few weeks before a race, or for anyone who wants running to take priority for a block. Two full-body sessions are usually enough to hold strength.

An 8-week build

This is a simple outline, not a fixed plan. Adjust it to where you're starting from.

If a week goes badly, repeat it rather than pushing on. If your race is a parkrun or similar free weekly 5k, you can use one as a time trial around week 4 to see where you are.

What to change in the gym

You don't need to stop lifting. Most lifters do best keeping their main lifts and trimming the extras:

• Keep the big lifts. Squats, deadlifts or their variations, presses and pulls stay in the week.
• Cut leg accessories first. If your legs are always heavy on runs, drop extra leg work such as lunges or leg-press volume before you drop a run.
• Leave a rep or two in reserve. Grinding out heavy sets to failure makes the next day's run harder than it needs to be.
• Watch the day before intervals. Upper body or rest is the best lead-in to a quality run.

Tracking a 5k block

The tricky part of training for a run while lifting is seeing both at once. If your runs live in one app and your gym sessions in another, it's easy to put intervals the day after a big leg session without noticing.

Strand keeps both in one log. Its GPS run tracker records distance, pace and time with the phone locked, with audio cues every kilometre and a distance or time goal, and every run keeps its route map, km splits and heart rate. Treadmill mode covers indoor runs, and runs recorded on a watch come in through Apple Health or Health Connect. Gym sessions sit in the same week, with automatic personal records so you can see whether your lifts are holding. Strand Pro adds a 5K race predictor and training load warnings when sessions stack up across running and lifting.

Common questions

Runs and lifts in one log

Strand tracks GPS runs, gym sessions, swims and nutrition in one app. Free on iPhone and Android.

This guide is general information, not medical or coaching advice. If you have an injury or health condition, speak to a qualified professional.