Strength, Mobility & Form for Runners

Strength, in short

Strength work lowers the energy cost of running at a given pace and keeps that cost from rising late in a long run. Across two 2024 meta-analyses, heavy training (80 percent or more of the heaviest weight you can lift once) improved running economy by a small amount¹ and time-trial performance by a moderate amount². In a randomized trial of 28 well-trained men, 10 weeks of heavy lifting and jumps twice a week lowered the oxygen cost late in a 90 minute run, while it rose slightly in men who only ran³. It does not make a runner injury-proof: across nine trials in 1,904 endurance runners, adding exercise programs made no significant difference to injury risk overall⁴.

Build each session on compound lifts (a squat, a hinge, a push and a pull across the week) and give single-leg work a place, because running loads one leg at a time. Heavy means 3 to 5 sets of 3 to 5 reps a rep or two short of failure, with 2 to 3 minutes of rest, in a session of 45 to 60 minutes. If you are new to lifting, start with 10 to 15 minutes of bodyweight work after runs (bridges, side planks, single-leg squats, side-lying leg raises, clamshells), then add two gym days a week. The guide on strength training for runners has the full version, and the guide on core work for runners covers the trunk and hips.

Fitting strength around the running

Running stays the priority, and strength is added around it. Lift when running volume is lowest, and cut back as running volume and intensity rise.

• Early in a build: two or three heavy sessions a week.
• As weekly mileage and intensity rise: two sessions, then one session a week through the peak, with two or three sets of the main lifts. One session is a small dose that still holds what you built.
• Taper: keep the sessions and make them lighter. In race week turn them into mobility (see the guide on tapering).
• Timing: lift after the run on a hard-run day or the day after a key run, so easy days stay easy, and skip heavy leg work the day before a hard workout, a long run or a race.
• If lifting leaves you with dead legs or you miss your workout paces, cut the weight or the volume before you touch the running.
• After three or four weeks or more away from lifting, do a third of what you did before, watch how the next four to eight hours go, and build back about three days later.

Form drills

Drills such as A-skips, B-skips, high knees, heel flicks and bounding exaggerate one part of the stride at low speed. They are practice in coordination and rhythm and not conditioning, and they are not slow running: in 17 long-distance runners, A-skips, B-skips and heel flicks took the ankle and foot through smaller ranges than running did, and bounding asked for more power at the ankle than running did⁵. A handful of drills at easy effort for five or six minutes, followed by easy running and a few strides, is the usual dose before faster runs. Treat bounding as jumping work and build it up slowly from a few short reps.

Leave your form mostly alone

There is no single correct technique to copy. In a 2024 meta-analysis of 51 observational studies (1,115 people), most stride measures were unrelated to economy, and any one measure explained only 4 to 12 percent of the differences between runners⁶. With no single form to copy, change yours only for a clear reason.

The three things worth a look are posture, overstriding and step rate. Cue an upright posture with a slight forward lean, especially uphill, and a quick, light touch with your feet landing under you. If you change anything, change one thing and give it months, because form usually feels worse before it feels better. The guides on running form and running cadence cover the cues and step rate.

Warm-up and mobility

A warm-up raises your temperature and rehearses the movement. Start with 5 to 10 minutes of dynamic moves such as leg swings and hip openers, then run easy, then add a few strides. The shorter and faster the session or race, the longer the warm-up should be.

Stretching is not an economy tool, and it is not a threat to it either. Pooled across 15 studies and 181 people, stretching before a run (static, dynamic or contract-relax) had no significant effect on running economy in either direction, though the certainty was low, and the authors found no evidence that stretching impairs economy⁷. So stretch before running if you like it, do not rely on it to run better, and do not skip a warm-up for fear of it.

The MYRTL routine

The MYRTL routine (Make Your Run Training Last) is a circuit of 12 hip-girdle exercises: clams, lateral leg raises, donkey kicks and whips, fire hydrants, knee circles, hurdle trail-leg drills and leg swings. Runsense hosts the PDF⁸. Each exercise either strengthens the hip girdle or adds range of motion there, and the PDF does not claim it prevents injury. Hip work has one good trial behind it: in 325 novice runners, a hip and core program done before runs lowered lower-limb injuries compared with static stretching. That trial tested its own program and not MYRTL⁹. Runsense plans can include the routine as an optional rest-day session, which is a product choice and not a finding.