Hamstring Strength: Beyond the Hip Thrust

Your strength routine includes hip thrusts, so you check off hamstrings and move on. Before adding faster running, ask a more useful question: does your routine include different ways to load the back of your thigh, or just one familiar movement?

A recent laboratory study offers a reason to review exercise selection. It does not supply a winning exercise, an injury guarantee, or a return-to-running test.

Medical disclaimer: This article is general education, not a diagnosis or an individual rehabilitation plan. Read our medical disclaimer. Current pain, a recent strain, or repeated injuries call for advice from a healthcare professional before changing exercise load.

What the new study actually measured

In a 2026 BJSM study, 20 active adults performed seven resistance exercises and four treadmill gait tasks. Researchers combined MRI, motion capture, and muscle-activity data to model hamstring forces and muscle-tendon stretch. These were estimates, not direct measurements of force inside a runner’s leg.

The Romanian deadlift produced the largest peak forces in two of the muscles studied. It and the single-leg hamstring bridge produced greater peak stretch than the other tasks. Hip thrusts generated comparatively low hamstring demands under the tested conditions. Results differed by muscle: the hamstrings are not one interchangeable unit.

Participants were resistance-trained, lifting efforts were high, and running took place on a curved, nonmotorized treadmill. The study did not track injuries or race performance. Higher modeled loading therefore cannot establish a better prevention exercise, and these results cannot rank every variation or load used at your gym.

Use the finding to ask a better training question

Our editorial interpretation is to audit the movement menu before chasing heavier weights. A hip thrust can remain in your program without being asked to cover every hamstring demand. The useful distinction is between choosing an exercise and proving what that exercise will accomplish for you.

If you already follow our two-session strength framework, review what is there before adding anything. That plan already includes a Romanian deadlift. More exercises are not automatically a better answer, particularly during a demanding race block.

For a pain-free runner discussing options with a qualified strength coach, these are reasonable questions:

• Hip hinge: Would a Romanian deadlift fit my current skills and equipment? Can I control the movement before adding weight?
• Bridge: What version suits my starting capacity? A familiar floor bridge should not be assumed to reproduce the study’s single-leg, elevated setup.
• Knee-flexion exercise: Would a curl or assisted variation serve a separate purpose? Do I need it now, or would it duplicate work I already tolerate?

This is an editorial decision checklist, not a tested sequence or a prescription to perform all three. The experiment’s demanding lifting protocol is not a beginner workout to copy.

Fit strength around the running you want to keep

For healthy runners, our coaching-style recommendation is to introduce one unfamiliar movement at a time, with a load and range you can control. Have a coach check technique if the movement is new. Keep the first exposure small enough that you can judge its effect on your next easy run before progressing.

Avoid introducing demanding hamstring work immediately before your key intervals, long run, or race. If the next run requires a changed stride, reduce the new work and reassess. Do not treat soreness as a score: it does not demonstrate that you reproduced the study’s loading or earned protection from injury. Our guide to running with sore legs explains why soreness and readiness deserve separate decisions.

Record the exercise, load, repetitions, and how the following run felt. Progress only one part of the session at a time. These are practical editorial guardrails; the BJSM experiment did not test this scheduling method.

Pain changes the decision

Do not use heavier lifting to test whether a painful hamstring is ready. NHS guidance describes sudden sharp pain, sometimes with a pop, as possible injury symptoms. Stop running and stop the exercise if hamstring pain begins; do not stretch or sprint through it to confirm the diagnosis.

Red flags needing urgent medical assessment include severe or worsening pain, extensive or increasing swelling or bruising, difficulty standing or walking, or fever and chills with the injury. For a U.S. reader, contact an urgent care service or a clinician who can assess you promptly.

Seek medical care if symptoms are not improving. Recurrent trouble or a previous significant strain warrants a sports medicine or physical therapy assessment. A calendar date, successful bridge, or comfortable easy mile alone should not decide your return to fast running.

Sources

• Hamstring force and stretch during progressively increasing running speeds and the eccentric phase of resistance training exercises commonly used for injury prevention and rehabilitation, British Journal of Sports Medicine, 2026. Primary biomechanics study; modeled loading, not a prevention or treatment trial.
• Hamstring injury, NHS. Symptoms, stop-exercise advice, urgent assessment signs, and guidance on persistent or recurrent injury. Care pathways above are adapted for U.S. readers.