Evidence map›Paper›PMID 37264461›Full record

ArticleJournal of physiological anthropology2023

Is the muscle-tendon architecture of non-athletic Kenyans different from that of Japanese and French males?

Yoko Kunimasa, Kanae Sano, Caroline Nicol, Joëlle Barthèlemy, Masaki Ishikawa

Abstract readComparative Study
In one paragraph

Article in Journal of physiological anthropology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Article
  2. Physiological Resilience: What Is It and How Might It Be Trained?Scandinavian journal of medicine & science in sports · 2025
    Review
  3. Article
  4. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Yoko KunimasaGraduate School of Sport and Exercise Sciences, Osaka University of Health and Sport Sciences, Kumatori-Cho, Sennan-Gun, Osaka, 590-0496, Japan. yoko.k@ed.niigata-u.ac.jp.ORCID http://orcid.org/0000-0003-2454-3037
Kanae SanoGraduate School of Sport and Exercise Sciences, Osaka University of Health and Sport Sciences, Kumatori-Cho, Sennan-Gun, Osaka, 590-0496, Japan.
Caroline NicolISM, CNRS & Aix-Marseille University, 13288, Marseille, France.
Joëlle BarthèlemyISM, CNRS & Aix-Marseille University, 13288, Marseille, France.
Masaki IshikawaGraduate School of Sport and Exercise Sciences, Osaka University of Health and Sport Sciences, Kumatori-Cho, Sennan-Gun, Osaka, 590-0496, Japan.

Funding

Japan Society for the Promotion of Science 17H07267Japan Society for the Promotion of Science 19K19998Japan Society for the Promotion of Science Open Partnership Joint Projects of JSPS Bilateral Joint Research Projects
6 · The paper itself

Abstract

backgroundIn endurance running, elite Kenyan runners are characterized by longer thigh, shank, and Achilles tendon (AT) lengths combined with shorter fascicles and larger medial gastrocnemius (MG) pennation angles than elite Japanese runners. These muscle-tendon characteristics may contribute to the running performance of Kenyans. Furthermore, these specific lower-leg musculoskeletal architectures have been confirmed not only in elite Kenyan runners but also in non-athletic Kenyans since early childhood. However, it remains questionable whether the differences in muscle-tendon architecture between Kenyans and Japanese differ from those of European Caucasians. Therefore, this study aimed to compare anthropometry and muscle-tendon architecture of young non-athletic Kenyan males with their Japanese and French counterparts.

methodsA total of 235 young non-athletic males, aged 17-22 years, volunteered. The anthropometric measures, thigh, and shank lengths, as well as AT and MG muscle architecture, were measured using ultrasonography and a tape measure. Inter-group differences in anthropometry and muscle-tendon architecture were tested using one-way ANOVA and ANCOVA analyses controlling for shank length and muscle thickness.

resultsThe anthropometric and muscle-tendon characteristics of the non-athletic French were closer to those of the Kenyans than to those of the Japanese. However, the ultrasonography analysis confirmed that the non-athletic Kenyans had the longest AT as well as the shortest MG fascicles and the largest pennation angle compared to the French and Japanese, even after controlling for shank length and muscle thickness with ANCOVA, respectively.

conclusionsThese results confirmed the specificity of the muscle-tendon architecture of the triceps surae in Kenyans in comparison to their Japanese and French counterparts in non-athletic adults. This study provides additional support to the fact that Kenyans may have musculotendinous advantages in endurance running.

Indexed as

Achilles TendonMuscle, SkeletalRunningAdolescentEast African PeopleEast Asian PeopleEuropean PeopleHumansKenyaLegMalePhysical EnduranceUltrasonographyYoung AdultAchilles tendonKenyansMuscle architectureMuscle-tendon unitUltrasonography

Identifiers

PMID37264461
PMCPMC10233967

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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.