Training & movement
C · Interpret with cautionEccentric versus concentric muscle actions for hypertrophy
Subject: Eccentric versus concentric muscle actions and hypertrophy
What this means
No statistically significant hypertrophy difference between eccentric and concentric actions (ES 0.285, 95% CI -0.131 to 0.701, p=0.179). Subgroup: eccentric better for upper limb muscles (p=0.018), interventions ≤8 weeks (p=0.046), muscle thickness measures (p=0.035), isokinetic contractions (p=0.025). 26 studies, 682 participants.
da Silva LSL, Gonçalves LDS, Alves Campos PH, Benjamim CJR, Tasinafo Junior MF, de Lima LCR, Bueno Junior CR, Alves CPL · 2025 · Journal of Strength and Conditioning Research 39(1):115-134
What does this rating mean?
Limited, mixed or hard-to-translate evidence. Useful as direction, not as a rule.
Findings
A comparison between the lowering and pushing phase of a movement as separate training stimuli.
Who this applies to
Apparently healthy adults, 18-59 years and ≥60 years.
Size of the research
26 studies, 682 participants in meta-analysis.
What to keep in mind
Very low evidence quality (GRADE); high heterogeneity (I² 84.4%); only randomized/controlled trials; no strength outcome data in abstract.
Practical conclusion for REZA
Interesting for specific goals, but not strong enough to change the standard programme.
View method and source
Methodology
Systematic review with meta-analysis
Original source
DOI: 10.1519/JSC.0000000000004981 · PMID: 39652733
View on PubMed →This information is general education about scientific research. It is not personal medical advice and does not replace diagnosis or treatment by a doctor or other healthcare professional. If you have symptoms, a medical condition or take medication, consult your GP or treating professional before changing your training or nutrition.