Effect of Phototherapy on Muscular Performance and Recovery in Exercise: A Systematic Review

This systematic review evaluated whether phototherapy, including red and near-infrared light photobiomodulation (PBM), can improve muscular performance and enhance recovery after exercise. Researchers analyzed available clinical studies involving athletes and physically active individuals to determine whether light therapy provides measurable benefits for exercise performance, fatigue reduction, and muscle recovery.

Study Design

Researchers reviewed human clinical studies that investigated:

• Red and near-infrared phototherapy
• Laser and LED photobiomodulation
• Athletic performance outcomes
• Exercise recovery markers
• Muscle fatigue and endurance measures

The review compared outcomes across multiple studies involving different exercise protocols and treatment parameters.

What Researchers Evaluated

The review examined effects on:

• Muscle strength
• Exercise performance
• Endurance capacity
• Muscle fatigue
• Recovery speed
• Muscle damage biomarkers
• Delayed onset muscle soreness (DOMS)
• Post-exercise functional recovery

Key Findings

Researchers found growing evidence that photobiomodulation may positively affect both muscular performance and recovery.

Reported benefits included:

• Improved muscle performance during exercise
• Increased endurance capacity
• Delayed onset of fatigue
• Faster post-exercise recovery
• Reduced muscle damage markers
• Improved recovery of muscle function after strenuous activity

Several studies showed that participants who received phototherapy were able to perform better during exercise and recover more efficiently afterward.

How Red Light May Improve Performance

Researchers explained that photobiomodulation appears to work by influencing mitochondrial function inside muscle cells.

Potential mechanisms include:

• Increased ATP (cellular energy) production
• Enhanced oxygen utilization
• Improved muscle metabolism
• Reduced oxidative stress
• Improved cellular repair processes
• Better recovery from exercise-induced muscle damage

These biological effects may help muscles maintain performance longer and recover faster after intense physical activity.

Before vs. After Exercise Benefits

The review noted that phototherapy may be beneficial when applied:

• Before exercise, helping improve muscular performance and resistance to fatigue.
• After exercise, helping accelerate recovery and reduce muscle stress.

This suggests that red light therapy may be useful as both a performance-enhancement and recovery-support tool.

Importance for Athletes

Researchers highlighted that non-invasive recovery tools are increasingly important in sports medicine. Because photobiomodulation has a favorable safety profile and can be applied without affecting training schedules, it has gained significant interest among athletes, trainers, and rehabilitation professionals.

Limitations

The authors noted that:

• Treatment parameters varied across studies.
• Wavelengths, doses, and application protocols were not standardized.
• More large-scale randomized controlled trials are needed.

Despite these limitations, the overall trend of evidence favored beneficial effects on muscular performance and recovery.

Conclusion

The review concluded that phototherapy shows promising potential for improving muscular performance and enhancing recovery after exercise. The findings support the growing use of red and near-infrared photobiomodulation as a non-invasive strategy for athletic performance support and post-exercise recovery.

https://pubmed.ncbi.nlm.nih.gov/24249354/