Red Light Therapy for Muscle Recovery: What Helps

Heavy legs after a long run, sore quads two days after a new gym programme, a training block that leaves you feeling flat: recovery is where red light therapy gets most attention from athletes. This guide is for runners, gym-goers and anyone who trains, and explains what research shows for muscle soreness and recovery, how timing around a session may matter, and where light therapy fits next to sleep, food and sports massage.

When to see someone: if you want to add light therapy to your recovery routine, a full-body red light therapy session in our NovoTHOR bed is £70 for 20 minutes in Chiswick. Book online or call 020 4515 0000.

Quick answer

Red light therapy for muscle recovery has been tested in many small trials, but the results are still mixed. A 2025 review found less muscle soreness three to four days after hard exercise and better strength in the first two days, while an earlier review found little effect. Most trials are small, many use lab-based exercise, and doses vary. It may help some people recover a little faster; sleep, nutrition and sensible training load still matter far more.

What red light therapy does for muscle recovery

Hard or unfamiliar exercise, especially downhill running or the lowering phase of a lift, causes tiny areas of damage in muscle fibres. Over the next one to three days this produces delayed onset muscle soreness (DOMS), stiffness and a temporary drop in strength. Your body repairs the damage and adapts, which is how you get fitter.

Red and near-infrared light are thought to be absorbed by the mitochondria, the energy-producing parts of muscle cells. Research suggests this may support energy production and reduce some markers of muscle damage and oxidative stress, which is the theory behind using light for recovery. It does not replace the repair process; at best it may make it a little more comfortable or a little quicker.

What the research shows for muscle soreness and recovery

• 2025 review on DOMS. Fourteen controlled studies, with four pooled in a meta-analysis, found moderately lower soreness scores at 72 and 96 hours after exercise and better muscle strength at 24 and 48 hours compared with placebo. The pooled analysis was small.
• 2016 review on DOMS. Fifteen studies with 317 people, each using a single session, found little effect on pain, swelling, range of movement or strength. Laser used before exercise lowered one blood marker of muscle damage. The authors said firm conclusions were limited by small, varied studies.
• 2022 review comparing light and cold. Four small trials (66 people) suggested light therapy after hard exercise helped strength and soreness more than cryotherapy, but the certainty of evidence was rated moderate to very low.

The picture is promising but not settled. There is no NICE guidance on red light therapy for exercise recovery. For a broader overview of where light therapy has stronger and weaker evidence, see our guide to red light therapy benefits.

Before or after training: does timing matter?

A lot of sports research has tested light applied before exercise, on the idea that it may prepare the muscle and reduce damage. Other trials apply it straight after, to support recovery. Both approaches have shown some benefit in some studies, and there is no agreed best timing.

• Before a session. Some trials found less fatigue and lower damage markers when light was used shortly before exercise.
• After a session. Most people find it easiest to fit in after training or on the day after a hard effort, when soreness is building.
• Around an event. Do not try anything new in the days before a race. If you plan to use light therapy, try it during normal training first.

Red light therapy for muscle soreness, strains and injury

Normal post-exercise soreness and a muscle injury are different things. Soreness is a dull, spread-out ache that peaks a day or two after training and fades within a few days. A strain usually starts suddenly during activity, with sharp pain in one spot, sometimes bruising or swelling, and weakness when you use the muscle.

For a fresh strain, the NHS advises protection, rest, ice, compression and elevation for the first two to three days, and avoiding heat and massage early on to limit swelling. A muscle tear or a strain that is not improving needs an assessment rather than light therapy alone. Our sports physiotherapy team can diagnose the problem and plan a return to training, and our guide to soft tissue injury healing time explains typical timelines.

Red light therapy, sports massage and other recovery tools

No single recovery tool beats the basics. In order of impact, most athletes gain the most from:

• Sleep. Most repair happens overnight. See our tips on sleep and recovery.
• Food and fluid. Enough protein and carbohydrate, and rehydrating after training.
• Sensible training load. Building up gradually and planning easier days.
• Hands-on work. Sports massage eases tight, heavy muscles and helps you spot overloaded areas early.

Red light therapy can sit alongside these. Many people combine a NovoTHOR session for whole-body recovery with sports massage on the muscles that did the most work.

How long, how often, and what does it cost?

A NovoTHOR session takes 20 minutes; you lie in a full-body LED pod with protective eyewear, and it feels like gentle warmth. For a single sore area, such as a calf or hamstring, a 30-minute THOR laser session delivers a more concentrated dose. People in heavy training often use two or three sessions a week during a demanding block. There is no evidence that daily or very long sessions work better.

At Omnia in Chiswick, NovoTHOR is £70 for 20 minutes and THOR laser is £80 for 30 minutes. The Omnia Red membership gives eight NovoTHOR sessions a month for £225, which suits regular use through a training block.

Red light therapy for muscle recovery at home

Home panels are popular with athletes, but they vary hugely in power, wavelength and size. Most published recovery studies used clinical lasers or LED arrays at measured doses, so results from home devices are hard to predict. If you use one, follow the instructions, protect your eyes, and judge it by how you train and feel over several weeks rather than after one session.

Who should take care, and when to see a doctor

Light therapy is generally well tolerated. Tell us before treatment if you take medicines that make your skin sensitive to light, are pregnant, have epilepsy triggered by light, or have a history of skin cancer. Always wear the eye protection provided.

Get urgent medical help from NHS 111 or A&E if, after exercise, you have severe muscle pain or swelling out of proportion to the session, marked weakness, or dark, tea-coloured urine, as these can be signs of serious muscle breakdown that affects the kidneys. Call 999 or go to A&E if you heard a crack or snap at the time of injury, the limb looks misshapen, or it is numb, cold or blue. Call 111 if you cannot bear weight, the pain or swelling is getting worse, or you feel hot and shivery.

Frequently asked questions

Does red light therapy help muscle recovery?

Some trials and a 2025 review suggest it can reduce soreness and help strength return faster after hard exercise, but other reviews found little effect and most studies are small. It may help some people a little. It works best as an extra on top of good sleep, nutrition and sensible training, not as a substitute for them.

How long should red light therapy be for muscle recovery?

A full-body NovoTHOR session is 20 minutes, and targeted laser sessions on one muscle group take around 30 minutes. Studies have used a wide range of doses, and more is not always better. Two or three sessions a week during heavy training is a common approach. Read how long red light therapy takes to work.

Is red light therapy good for muscle repair after injury?

Light therapy has been studied for muscle injury, but most research is in exercise-induced soreness rather than proper tears. For a fresh strain, follow PRICE for the first few days and get a significant injury assessed. Light therapy can then be one part of a rehabilitation plan led by a physiotherapist, alongside progressive loading exercises.

Should I use red light therapy before or after a workout?

Both have been tested. Some studies used light shortly before exercise and found less fatigue and lower muscle damage markers; others used it afterwards to support recovery. There is no agreed best time. Pick the timing that fits your routine, keep it consistent, and avoid trying it for the first time just before a race.

Red light therapy for muscle recovery in Chiswick

Our clinic is at 8 to 9 Bedford Corner, The Avenue, Chiswick W4 1LZ, close to Turnham Green station, on bus routes 94, E3 and 272. Limited parking is available on request when booking. Sports massage, physiotherapy and red light therapy are all under one roof, so recovery can be planned around your training.

Read about muscle pain and sports injuries, see why your muscles ache, or compare NovoTHOR and THOR laser.

Book red light therapy in Chiswick: NovoTHOR 20 minutes £70, THOR laser 30 minutes £80. Book online or call 020 4515 0000.

This article is general information, not medical advice. If you have any of the warning signs above, seek medical attention.