ArticleThe American journal of sports medicine2022
Effect of Sex and Maturation on Knee Extensor and Flexor Strength in Adolescent Athletes.
Article in The American journal of sports medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 2 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
10 citing papers in PubMed, 2 syntheses or guidelines pooled it, 15 citations in OpenAlex.
- Sex Differences in Upper- and Lower-Limb Muscle Strength in Children and Adolescents: A Meta-Analysis.European journal of sport science · 2025Pooled it
- Sex Differences in Grip Strength From Birth to Age 16: A Meta-Analysis.European journal of sport science · 2025Pooled it
- Weighted total genotype score associated with knee ligament injury incidence in adolescent female basketball athletes.BMC sports science, medicine & rehabilitation · 2026Article
- Hamstrings-to-quadriceps ratio in female and male children and adolescents across the velocity spectrum.European journal of applied physiology · 2026Article
- Comparative effects of exercise modalities on ectopic fat reduction in overweight and obese children and adolescents: a narrative review.European journal of pediatrics · 2026Review
- Adolescence risk factors for meniscus and ligamentous knee injuries in adulthood: A longitudinal study.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- A study on the correlation between knee muscle strength and agility in competitive Wushu Changquan athletes.Frontiers in physiology · 2026Article
- Isokinetic Strength Profiles Among Youth after Medial Patellofemoral Ligament Reconstruction.International journal of sports physical therapy · 2025Article
- Sex Differences Exist in the Relationship Between Vertical Jump Performance Biomechanical Parameters and Hamstring/Quadriceps Ratio in Adolescent U18 Track and Field Athletes.Sports (Basel, Switzerland) · 2024Article
- Effect of Sex and Age on Knee Strength in Young Athletes: A Systematic Review and Meta-analysis.International journal of exercise science · 2024Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 5 institutions in 2 countries.
Funding
Abstract
backgroundDespite knee extensor and flexor strength reportedly being associated with injury risk, including rupture of the anterior cruciate ligament in girls, there is limited evidence for the longitudinal changes in lower extremity strength. PURPOSE: To investigate the sex-specific relationship with longitudinal changes of knee extensor and flexor strength associated with maturation. STUDY
designCohort study; Level of evidence, 2.
methodsAdolescent boys and girls (N = 257; 208 adolsecent girls) participating in high school basketball, volleyball, and soccer were assessed longitudinally in at least 2 different pubertal stages. Pubertal status (prepubertal, pubertal, and postpubertal) was determined with the modified Pubertal Maturation Observation Scale questionnaire. After a warm-up of 5 submaximal repetitions, participants were tested for concentric peak isokinetic strength for knee extension and flexion at 300 deg/s over 10 repetitions and normalized to body weight. Linear mixed models were used to test for the effect of pubertal stage, sex, and their interaction.
resultsSignificant interactions were identified that indicated different maturational trajectories for knee muscle strength for adolescent boys and girls, particularly between prepubertal and pubertal stages, in which boys demonstrated greater mass normalized knee extensor increases than girls (right, +12% vs +5%; left, +13% vs +7%;
conclusionThe findings of this study support a differential effect of sex and maturation on important knee strength outcomes that may have implications for knee injury reduction, particularly in adolescent girls as they mature.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.