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Development of tables for classifying judo athletes according to maximal isometric strength and muscular power, and comparisons between athletes at different competitive levels

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Abstract

The objectives of this study were to develop normative tables to classify judo athletes by maximal isometric strength and muscular power, and to compare performance at different competitive levels. 102 male athletes performed tests of maximal isometric handgrip strength (MIHS), scapular humeral traction (MISHT), lumbar traction (MILT), lower body traction (MILBT), plyometric push-up (PPU), countermovement jump (CJ) and squat jump (SJ). Performance was classified as: ≤ 10th percentile = very poor, 11–25th percentile = poor, 26–75th percentile = regular, 76–90th percentile = good and > 90th percentile = excellent. Classification relative to body mass [isometric (kg/kg) and power (cm kg)] was as follows: MIHS—very poor: ≤ 0.81; poor: 0.82–0.96; regular: 0.97–1.51; good: 1.52–1.79; excellent: ≥ 1.80, MILT—very poor: ≤ 1.14; poor: 1.15–1.41; regular: 1.41–2.0; good: 2.0–2.5; excellent: ≥ 2.6, MILBT—very poor: ≤ 1.15; poor: 1.16–1.44; regular: 1.45–2.15; good: 2.16–2.62; excellent: ≥ 2.63, MISHT—very poor: ≤ 0.34; poor: 0.35–0.41; regular: 0.42–0.62; good: 0.63–0.73; excellent: ≥ 0.74, PPU—very poor: ≤ 635.4; poor: 635.5–901.9; regular: 902.0–1801.4; good: 1801.5–2369.7; excellent: ≥ 2369.8, SJ—very poor: ≤ 1690.7; poor: 1690.8–1990.3; regular: 1990.4–3387.9; good: 3388.0–4029.4; excellent: ≥ 4029.5 and CJ—very-poor: ≤ 1775.4; poor: 1775.5–2195.4; regular: 2195.5–3667.2; good: 3667.3–4208.3; excellent: ≥ 4208.4. State athletes had lower MISHT (p = 0.015) than international athletes and lower CJ than national athletes (p = 0.05). International athletes showed better PPU performance than others (p < 0.05). MIHS, MISHT and PPU were sensitive to identify differences between competitive level of judo athletes (state, national and international level).

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Abbreviations

MIHS:

Maximal isometric handgrip strength

MILT:

Maximal isometric lumbar traction

MILBT:

Maximal isometric lower body traction

MISHT:

Maximal isometric scapular humeral traction

PPU:

Plyometric push-up

SJ:

Squat jump

CJ:

Countermovement jump

VJ:

Vertical jump

ICC:

Interclass coefficient

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Funding

This study was funded by the authors.

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Correspondence to Braulio Henrique Magnani Branco.

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The authors declare that there are no conflicts of interests.

Ethical approval

The study was approved by the local ethics committee (57428916.9.0000.0104 - State University of Maringá, Paraná, Brazil). The study followed the recommendations of the Helsinki Declaration.

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All athletes signed the informed consent to participate in the present study.

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Branco, B.H.M., Andreato, L.V., Ribeiro, E.D. et al. Development of tables for classifying judo athletes according to maximal isometric strength and muscular power, and comparisons between athletes at different competitive levels. Sport Sci Health 14, 607–614 (2018). https://doi.org/10.1007/s11332-018-0469-7

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