Evidence map›Paper›PMID 40229595›Full record

ArticleEuropean journal of applied physiology2025

Comparison between concentric-eccentric and concentric-only plantar flexor exercise training with body weight for changes in muscle strength, range of motion, and muscle architecture.

Masatoshi Nakamura, Takuma Kamazawa, Shigeru Sato, Riku Yosida, Kazunori Nosaka

Abstract readComparative Study
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Article in European journal of applied physiology, 2025. 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
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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

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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.

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4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Masatoshi NakamuraFaculty of Rehabilitation Sciences, Nishi Kyushu University, 4490 - 9 Ozaki, Kanzaki, Saga, 842 - 8585, Japan. nakamuramas@nisikyu-u.ac.jp.ORCID http://orcid.org/0000-0002-8184-1121
Takuma KamazawaDepartment of Rehabilitation, Kawagoe Rehabilitation Hospital, Kawagoe, Saitama, Japan.
Shigeru SatoDepartment of Bio-environmental Adaptation Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi, Minami-ku, Hiroshima, Japan.ORCID http://orcid.org/0000-0002-4669-551X
Riku YosidaDepartment of Rehabilitation Medicine, Maniwa Orthopedics Clinic, Niigata, Niigata, Japan.ORCID http://orcid.org/0009-0006-3796-3064
Kazunori NosakaSchool of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia.ORCID http://orcid.org/0000-0001-7373-4994

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe present study tested the hypothesis that inclusion of prolonged eccentric (lengthening muscle) contractions would increase muscle adaptations greater than concentric-only contractions.

methodsFifteen sedentary men (20-21 years) underwent 16 resistance exercise sessions in 8 weeks (twice a week) using their body weight. They used two legs to raise heels in 1 s (concentric-only plantar flexions: CON) and used only one leg to lower the heel in 3 s (concentric-eccentric plantar flexions: CON-ECC). The number of contractions was 5 or 10 in a set and was increased gradually from 5 to 70 repetitions a session over 16 sessions. In addition, 10 participants (19-24 years) were recruited as a control group without resistance exercise. Outcome measures consisted of maximal voluntary isometric contraction (MVIC) torque of plantar flexors, triceps surae muscle thickness (MT) and architecture, and dorsiflexion range of motion (ROM) measured at baseline and 3-5 days after the last training session or with an 8-week interval (control group). Changes in the measures were compared between legs by a split-plot analysis of variance.

resultsNo significant differences between legs were evident at baseline for the measures between legs as well as the leg in the control group. The CON-ECC leg showed increases (P < 0.05) in MVIC torque (32.9 ± 25.0%), MT (9.1 ± 7.0%), and ROM (30.4 ± 31.8%), but no such increases were evident for the CON leg and the leg in the control group.

conclusionThese results supported the hypothesis and showed that inserting eccentric contractions in the resistance exercise were critical to maximize muscle adaptations.

Indexed as

Body WeightMuscle, SkeletalMuscle StrengthRange of Motion, ArticularResistance TrainingAdaptation, PhysiologicalAdultHumansIsometric ContractionMaleMuscle ContractionYoung AdultDorsiflexionHeel raiseLengthening contractionMaximal voluntary isometric contraction torqueTriceps surae

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Registered trials

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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 Socratic graph.