Matheus Daros Pinto

Our meta-analysis on sex differences in muscle strength in kids, which was published in April 2025, is now one of the top cited papers in the European Journal of Sport Science over the past two years. @MatheusdPinto

NEW: Pre-print of our new meta-analysis now available. Using data from 78 studies and over 120,000 males and females, we found that the muscle strength-to-body mass ratio is generally greater in males than females. Thus, dividing muscle strength by body mass does not mathematically eliminate the male strength advantage. This is likely because factors other than body mass contribute to the sex difference in muscle strength and because the relationship between muscle strength and body mass is not linear, which is what is assumed when dividing muscle strength by body mass (i.e., ratio scaling). Further, we found that the sex difference in the strength-to-body mass ratio is smallest in children and largest in adults, and it is greater in upper- than lower-limb muscles. Note: This paper is currently undergoing peer review at a journal. Some contents of the pre-print will change after we receive feedback from reviewers. How to Support Our Work: This research was conducted independently, without institutional backing or external funding. If you value this work and would like to support it, please visit the GoFundMe link in the comments or in my pinned tweet. Thank you for your support. Co-author: @MatheusdPinto

🧵NEW: Our latest paper is a meta-analysis of sex differences in upper- and lower-limb strength in kids aged 5-17 years old (3,497 boys; 3,137 girls). Before, during, and after puberty, boys are stronger than girls on average. The sex difference in muscle strength is ~10% in 5–10-year-olds and increases to ∼40% in 14–17-year-olds. Throughout development, the sex difference in strength tends to be more pronounced in upper- than lower-limb muscles. Co-author: @MatheusdPinto

Nice to see people contemplating the results of our recent meta-analysis on eccentric vs concentric muscle strength. @JamesSteeleII @MatheusdPinto

NEW: Our overview of minimal dose resistance exercise is now available @SportsMedicineJ #OpenAccess. Co-author: @MatheusdPinto link.springer.com/article/10…

NEW: We updated the REPS-%1RM table that has been printed in the NSCA textbook for ~20 years One table for leg press One table for bench press One table for all other exercises Published #OpenAccess @SportsMedicineJ Authors:@MatheusdPinto @JamesSteeleII link.springer.com/article/10…

Now in-print: Our overview of muscle fatigue (acute strength loss) during max eccentric vs concentric resistance exercise. The quadriceps appear more "protected" against muscle fatigue and damage from max eccentrics than arms muscles. @MatheusdPinto onlinelibrary.wiley.com/doi/…

NEW: Our latest review Does acute strength loss (#fatigue) differ after MAX eccentric vs MAX concentric exercise? Depends on the muscle Lower-limb muscles appear more protected against acute strength loss & DOMS from eccentrics than upper-limb muscles Co-author:@MatheusdPinto

New study on EMG during biceps curls with a dumbbell vs Tonal machine. @MatheusdPinto & I published 2 similar studies on the Vitruvian machine 1.link.springer.com/article/10… 2.onlinelibrary.wiley.com/doi/… And a review on CARE technology link.springer.com/article/10… nature.com/articles/s41598-0…

Now in issue We used the Vitruvian machine and its automatic drop setting to study muscle fatigue during max eccentric, concentric, and eccentric-concentric curls Men fatigued more w/concentrics Women fatigued more w/eccentrics Co-author @MatheusdPinto onlinelibrary.wiley.com/doi/…

1. NEW: How much stronger are muscles eccentrically than concentrically? Our meta-analysis of 1,516 ECC:CON strength ratios from 12,546 individuals provides the answer. Published @SportsMedicineJ #OpenAccess Data @OSFramework Co-authors @MatheusdPinto @JamesSteeleII

NEW PAPER: Based on my previous research on letters to the editor, I created an assignment intended to help students learn of the role of letters in science. I hope you will consider it for your research methods class. #OpenAccess @AdvPhysiolEduc journals.physiology.org/doi/…