The Study
Inducing hypertrophic effects of type I skeletal muscle fibers: A hypothetical role of time under load in resistance training aimed at muscular hypertrophy.
This isn't a real study with experiments or data—it's just someone sharing an idea about how muscles might grow. It's like a guess, not proof, so we can't be sure if it's true.
Analysis score
Maximum 0 for a editorial/opinion.
Where the score came from
Heavy weights might make fast-twitch muscles bigger, and light weights might make slow-twitch muscles bigger.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 50 / 100
Quality score
Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Not specified
- 2Not specified
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Medical hypotheses
Year
2018
Authors
J. Grgic, J. Homolak, P. Mikulic, J. Botella, B. Schoenfeld
Related Content
Claims (4)
Lifting lighter weights might make your slow-twitch muscles grow more than your fast-twitch muscles, according to some new ideas.
Lifting heavy weights might make your fast-twitch muscle fibers grow bigger than your slow-twitch ones, according to some new research.
Slow-twitch muscle fibers need longer workout times to grow because they tire less easily. This can be done by lifting lighter weights until you can't lift anymore.
Slow-twitch muscle fibers (type I) can work longer without getting tired compared to fast-twitch fibers (type II), which might help you lift weights for more time before exhaustion.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.