Red Light Therapy Before or After a Workout: Which Is Better?

Research does not name one best time for everyone. Light before exercise is better studied for endurance and muscle protection, and light after exercise is better studied for soreness.

Quick Summary

• Before a workout: best studied for fatigue, endurance, and muscle protection.

• After a workout: best studied for soreness and recovery.

• Device, dose, and protocol matter as much as timing.

Red light therapy is a wellness treatment that uses red and near-infrared light on the skin. Scientists call it photobiomodulation, or PBM. Studies on athletes and gym-goers have tested it before exercise, after exercise, or both.

The results are encouraging, but they are not uniform. Systematic reviews report that light before exercise tends to improve muscle performance and lower fatigue markers. Some trials found no effect, and a few found worse results. Devices, doses, and muscle groups differ a lot from study to study.

So the honest answer to “red light before or after workout” is that it depends on your goal. This guide covers timing, duration, frequency, weight loss, bodybuilding, sauna use, and safety. It also shows what to check at a gym or studio.

What Is Red Light Therapy and How Does It Work?

Red light therapy uses low-level red and near-infrared light to reach skin and the tissue beneath it. Red light is usually in the 630–660 nm range. Near-infrared light is usually in the 800–850 nm range and goes deeper.

The main idea is simple. Cells absorb the light through an enzyme in the mitochondria called cytochrome c oxidase. This may help the mitochondria make more ATP, the fuel muscle cells use to contract. It may also change how cells handle oxidative stress and inflammation.

These are the reasons researchers study red light therapy benefits for exercise. More cellular energy could delay fatigue. Less oxidative stress and inflammation could mean less damage after hard training.

Devices fall into two groups: targeted devices and whole-body systems.

Most older trials used targeted applications. Whole-body research is newer, so its results are less settled.

A device is only as useful as its output. A cheap lamp with low power and the wrong wavelength may do very little.

Is Red Light Therapy Better Before or After a Workout?

Neither timing wins in every case. Before exercise has stronger support for performance, and after exercise has stronger support for soreness. The right choice depends on your device, your protocol, and what you want from your training.

Red Light Therapy Before a Workout

Red light therapy before workout sessions aims to prepare the muscle. Researchers call this pre-conditioning. The light may raise cellular energy before the muscle is stressed.

Systematic reviews of pre-exercise PBM report better muscle performance and lower fatigue markers. Trials include volleyball players, cyclists, and recreational runners. Many studies applied light to the working muscles a few minutes before exercise.

One trial in professional soccer players tested whole-body PBM before and after muscle-damaging exercise. Light before exercise lowered creatine kinase, a muscle damage marker. It also lowered soreness at 48 to 72 hours. Performance did not improve in that trial.

That last point matters. Pre-workout light is not a guaranteed boost. Results depend on dose, wavelength, and how well the light covers the muscles you train.

Red Light Therapy After a Workout

Red light therapy after workout sessions aims to help the body recover. The goal is less soreness and faster return to normal function. Researchers study this most for delayed onset muscle soreness, or DOMS.

A meta-analysis of 13 randomized trials compared PBM with sham light. People who got real light reported less soreness right after exercise and at 24 hours. Peak torque, a measure of muscle force, was also higher through 96 hours. The authors did not find support for one standard regimen.

This is where red light therapy for muscle recovery looks most promising. Still, “promising” is not “proven for everyone.” Trial sizes are small, and protocols vary widely.

In the soccer trial, light after exercise lowered DOMS at every time point from 24 to 72 hours. It did not change muscle performance.

Can You Use Red Light Therapy Both Before and After a Workout?

You can, but you may not need to. Some trials combined both, and a few used pre- and post-exercise light in the same program. No strong evidence shows that using red light therapy before and after workout sessions beats choosing one.

Follow your device manual. Some devices cap daily use. Extra sessions add time and cost without proven gain.

A practical approach is to pick one timing first. Use it for four weeks and track how you feel. Add a second session only if you have a clear reason and the device allows it.

What Does Research Say About Red Light Therapy for Exercise?

The research is large but uneven. Reviews link PBM to less muscle damage, lower inflammation and oxidative stress markers, and better recovery. They also say the results are not a consensus. Some studies found no benefit.

Four factors explain much of the mismatch:

• Wavelength: Red and near-infrared light reach different depths.

• Dose: Energy is measured in joules. Some studies saw favorable results around 180 to 300 joules per treated muscle area.

• Treatment area: Light must cover the muscles used in the workout.

• Device type: Lasers, LEDs, and whole-body systems deliver light differently.

Dose follows a window. Too little light does nothing, and too much may blunt the effect. That is why longer sessions are not automatically better.

Localized PBM and whole-body PBM are not the same thing. A 2025 systematic review looked at whole-body use for performance and recovery and reported supportive evidence. The body of whole-body trials is still small.

Set realistic expectations. Red light therapy is a possible add-on, not a replacement for training, food, and sleep. It does not guarantee results.

Red Light Therapy Before or After a Workout for Weight Loss

Evidence for red light therapy before or after a workout for weight loss is weak. Some small studies on body contouring show modest changes in waist or thigh measurements. Those studies were short and used specific clinical devices. Results were not consistent.

The same applies to red light therapy before or after a workout for fat loss. No solid evidence shows that timing changes fat loss. No evidence shows that it removes belly fat from one area.

Fat loss comes from a sustained calorie deficit, resistance training, daily movement, and sleep. Red light therapy might help you train harder or recover faster. That could support your routine indirectly. It does not replace a calorie-controlled diet and regular exercise.

Be careful with any studio or product that promises “melting” fat. Strong claims need strong trials, and those trials do not exist yet.

Red Light Therapy Before or After a Workout for Bodybuilding

If you search for red light therapy before or after a workout bodybuilding, you want one answer. Does it build muscle? The honest answer is that it may support recovery and training quality. It does not build muscle on its own.

Some trials of strength training combined with PBM reported larger gains in muscle thickness or strength than training alone. Some reviews found similar gains whether light was used before or after sessions. These studies are early, and many used small groups.

Muscle growth still depends on four basics:

• Progressive resistance training

• Enough protein and total calories

• Seven to nine hours of sleep

• Rest days between hard sessions

For lifters, a practical use is targeted light on heavy-use muscles. Use it before leg day to reduce fatigue, or after to reduce soreness. Results vary by device and protocol, so test one change at a time.

How Long Should You Use Red Light Therapy Around a Workout?

Session length depends on the device and its power. A weak panel needs more time than a strong one. Always start with the manufacturer’s instructions. This is the core of red light therapy session duration.

How Long Before a Workout Should You Use It?

Many studies applied light a few minutes before exercise, often 3 to 10 minutes per muscle group. Use light shortly before your warm-up or workout, as your device instructions allow.

Do not guess the time. Output differs from device to device. Ten minutes on one device may deliver the dose of two minutes on another.

How Long After a Workout Should You Use It?

Many post-workout protocols start soon after training, often within about 30 minutes. Panel sessions commonly run 10 to 20 minutes, depending on distance and power.

Longer exposure is not automatically more effective. If you get skin redness or warmth, shorten the session or increase distance.

How Often Should You Use Red Light Therapy?

Frequency depends on your device, your goal, and the protocol. Some trials used a single session before a test. Others used sessions several times a week for weeks. No weekly schedule fits everyone.

Consistency matters more than squeezing in extra sessions. Keep a simple log. Track soreness, workout quality, and sleep for four weeks. If nothing changes, adjust the protocol instead of adding more time.

Is 3 Times a Week Enough for Red Light Therapy?

Three sessions a week may be enough for some protocols. It is not a universal rule. A person who trains three days a week may match sessions to those days. A person who trains six days a week might use light on hard days only.

Many consumer guides suggest 3 to 5 sessions a week. Treat that as a starting range, not a prescription. Judge it by your results and your device manual.

Can You Use Red Light Therapy at the Gym?

Yes, many gyms and wellness studios offer red light therapy at gym locations or on-site recovery rooms. It can fit before a workout, after a workout, or on a rest day. You may also use a home device.

Check these points before you book:

• The wavelengths and power output are listed.

• Staff give eye protection and explain the session.

• Staff screen for medications and health conditions.

• Equipment is cleaned between clients.

• The studio does not promise guaranteed results.

If a facility cannot tell you the wavelength or power, ask again. That information shapes the dose you get.

Can You Combine Red Light Therapy With a Sauna?

You can use both, but they work differently. Red light therapy uses light with little heat. A sauna uses heat to raise body temperature. No strong evidence shows that stacking them gives better results.

If you want red light therapy before or after the sauna, follow each device’s rules. Many manuals ask for clean, dry skin. Sweat, lotion, and sauna residue can change how light reaches the skin.

Keep these points in mind:

• Drink water before and after heat exposure.

• Skip the sauna if you feel dizzy or dehydrated after a hard workout.

• Keep each session within its recommended time.

• Stop if you feel unwell.

Heat adds stress after intense training. If you are new to saunas, test your tolerance on a lighter day first.

Is Red Light Therapy Safe Before or After Exercise?

Red light therapy is generally considered low risk when used as directed. Red light therapy safety still depends on the device, your skin, and your health. Most side effects are mild, such as temporary redness, warmth, or dry skin.

Follow these precautions:

• Protect your eyes. Wear the goggles that come with the device. Do not stare into bright LEDs.

• Watch your skin. Stop if you notice burning, rash, or lasting redness.

• Avoid open wounds and skin infections. Do not treat them unless a clinician advises it.

• Check your medications. Some drugs and supplements make skin more sensitive to light.

Talk to a healthcare provider first if you are pregnant, have cancer, have a light-triggered seizure condition, or take photosensitizing medication. Ask too if you use an implanted device.

Red light therapy does not treat injuries. See a clinician for sharp pain, swelling, joint instability, or dark urine after hard exercise.

What Should You Avoid Before Red Light Therapy?

What not to do before red light therapy? The short list is: do not skip the instructions, do not apply blocking products, and do not skip eye protection.

• Skip lotion, sunscreen, and makeup on the treated area. They can block or scatter light.

• Do not use photosensitizing products without advice. Retinoids, strong acids, and some medications can raise skin sensitivity. Ask a pharmacist or doctor.

• Do not cover the target area. Clothing can block light. Many devices work best on bare, dry skin.

• Do not wear contacts or skip goggles. Protect your eyes during every session.

• Do not assume every device has the same rules. Preparation varies by device. The manual is your guide.

Sensitive skin needs extra care. Start with shorter sessions and more distance, then increase slowly.

Common Mistakes and Troubleshooting

Most disappointing results come from a handful of fixable errors. Use this table to diagnose yours.

The biggest mistake is treating light as a fix for poor recovery habits. Sleep, food, and smart training load come first.

How to Add Red Light Therapy to Your Workout Routine

Start with your main goal. Choose one change, test it, and measure it.

1. Pick your goal. Choose performance or recovery. Use light before workouts for the first, after workouts for the second.

2. Choose a device. Match it to your muscle group and budget. Check wavelength and power.

3. Follow the protocol. Use the manufacturer’s time and distance.

4. Track your response. Log soreness, workout quality, and sleep for four weeks.

5. Keep the basics central. Training, food, sleep, and rest do the heavy lifting.

If you train hard most days, use light on your heaviest days first. Then adjust.

Explore Red Light Therapy at Tummo Studios

Tummo Studios offers red light therapy that can fit into a training or recovery routine. A session may suit you if you want a guided setup instead of buying a device. Staff can also explain how timing fits your goals.

Visit the Tummo Studios red light therapy page to see the treatment, learn what a session involves, and book when you are ready.

Frequently Asked Questions

Is red light therapy better before or after a workout?

It depends on your goal. Before a workout has stronger support for fatigue and muscle protection. After a workout has stronger support for soreness. Neither timing is proven best for everyone.

Can red light therapy help with muscle recovery?

It may. Reviews report less soreness and better strength recovery in some trials. Results vary by device and protocol, and some studies found no effect.

Can you use red light therapy before and after working out?

Yes, if your device allows it. No strong evidence shows two sessions beat one. Start with one timing and add a second only with a clear reason.

Is red light therapy three times a week enough?

It can be for some protocols. Frequency depends on your device, goal, and training schedule. Track your results and adjust.

Can red light therapy help with weight loss?

Evidence is weak. It may support training and recovery, but it does not replace diet and exercise. It does not target belly fat.

How long should a red light therapy session last?

Follow your device’s instructions. Many pre-workout protocols use a few minutes per muscle group. Post-workout panel sessions often run 10 to 20 minutes. Longer is not always better.

Is whole-body red light therapy better than a targeted device?

Not proven. Whole-body systems cover more muscle, while targeted devices focus on one area. Most older research used targeted devices.

Does red light therapy work if I am already training hard?

It may support recovery, but it will not offset overtraining. Fix training load, sleep, and nutrition first. Then test light as an add-on.

What are the side effects of red light therapy?

Most are mild, like temporary redness, warmth, or dry skin. Eye strain can happen without goggles. Stop use if you notice burning or a rash.

Who should avoid red light therapy?

Ask a doctor first if you are pregnant, have cancer, have a light-triggered seizure condition, or take photosensitizing drugs. Avoid use over open wounds or skin infections.