Key Takeaway
Acute foam rolling during warm-up reduces myofascial tissue stiffness while having minimal negative effects on muscle strength, supporting its use as a pre-exercise preparation tool.
Summary
This systematic review and meta-analysis, published in the Journal of Strength and Conditioning Research (2023;37(4):951-968), investigated the acute effects of foam rolling on two important outcomes: myofascial tissue stiffness and muscle strength. The study used the GRADE (Grading of Recommendations, Assessment, Development, and Evaluations) approach to assess the certainty of evidence, adding methodological rigor to the analysis.
The pooled results demonstrated that a single bout of foam rolling acutely reduces myofascial tissue stiffness. This provides mechanistic support for the commonly reported sensation of "looseness" after foam rolling. The reduction in tissue stiffness may explain the acute ROM improvements found in other meta-analyses, as stiffer tissues resist stretch more.
Regarding muscle strength, the meta-analysis found that foam rolling does not produce meaningful negative effects on force-producing capacity. This is an important practical finding because it supports incorporating foam rolling into warm-up routines without concern for impaired subsequent performance. The GRADE assessment provided moderate certainty for the stiffness findings and helps clinicians and coaches make evidence-informed decisions about foam rolling prescription.
Methods
Systematic review and meta-analysis using GRADE approach for evidence certainty assessment. Searched major databases for controlled studies examining acute effects of a single foam rolling bout on tissue stiffness (measured via shear wave elastography or similar) and muscle strength outcomes. Meta-analysis performed with pooled effect sizes. Risk of bias and evidence quality systematically assessed.
Key Results
- Acute foam rolling significantly reduces myofascial tissue stiffness
- No meaningful negative effect on muscle strength after foam rolling
- GRADE certainty: Moderate for tissue stiffness outcomes
- Supports foam rolling as a warm-up tool without performance trade-offs
- Published in J Strength Cond Res 2023;37(4):951-968
Limitations
- Acute effects only; does not address whether repeated use leads to lasting stiffness changes
- Variability in stiffness measurement methods across studies
- Most studies examined lower extremity muscles; upper body data limited
- Foam rolling protocols varied (duration, pressure, speed)
- Short follow-up periods; unclear how long acute stiffness reduction persists