Evidence map›Paper›PMID 38077436›Full record

ArticlePeerJ2023

Relationship between isokinetic strength of the knee joint and countermovement jump performance in elite boxers.

Chao Chen, Zhalel Ali, Muhammad Abdul Rehman Rashid, Marchibayeva Ulbossyn Samethanovna, Guodong Wu, Sagidolla Mukhametkali, Tussipkan Dilnur

Open access · goldAbstract read
In one paragraph

Article in PeerJ, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
3.2field-weighted citation impact, top 7% of its field
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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

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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

7 authors at 5 institutions in 3 countries.

Chao ChenShanghai University of Sport, Shanghai, China.
Zhalel AliGumilyov Eurasian National University, Astana, Republic of Kazakhstan.
Muhammad Abdul Rehman RashidGovernemnt College University Faisalabad, Faisalabad, Pakistan.
Marchibayeva Ulbossyn SamethanovnaGumilyov Eurasian National University, Astana, Republic of Kazakhstan.
Guodong WuJiangsu Vocational Institute of Commerce, Nanjing, China.
Sagidolla MukhametkaliShanghai University of Sport, Shanghai, China.
Tussipkan DilnurNational Center for Biotechnology, Astana, Republic of Kazakhstan.
L. N. Gumilyov Eurasian National University · KZShanghai University of Sport · CNJiangsu Vocational Institute of Commerce · CNNational Center for Biotechnology · KZUniversity of Faisalabad · PK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: The lower limbs play a key role to develop the linear momentum for hitting power in effective boxing. The knee extensor and flexor strength guarantees the dynamic stability of boxers. The insufficient extensor strength of the lower extremities causes compensation during flexion resulting in movement errors or damage to knee joint muscles. This study was conducted to explore the isokinetic concentric strength of the knee flexor and extensor and the relationship between isokinetic knee extensors strength and countermovement jump (CMJ) performance in elite boxers. Methods: Thirteen elite male boxers (Age: 25.15 ± 3.98 years, height 1.72 ± 0.04 m, weight 61.82 ± 10.46 kg, training years = 11.56 ± 2.67 years) performed the CMJ, and the isokinetic knee test was performed using the Biodex dynamometer. Results: The maximal isokinetic peak torque of the knee extensor and flexor muscles was recorded at three angular velocities (60°/s, 180°/s, and 240°/s) on both sides of the legs. The relative peak value of torque in the knee extensors decreased significantly with increasing angular velocity. A difference in relative peak torque (RPT) was only seen at 60°/s in knee flexors. However, the H/Q ratio increased as the velocity increased from 60°/s to 240°/s ( Conclusions: We suggest that explosive force training of the isokinetic muscles should be optimally carried out at a speed of 240°/s. The results of this study provide a reference for boxers to improve their jump height and lower-limb explosive strength through isokinetic strength training of the knee flexor and extensor.

Indexed as

KneeKnee JointAdultHumansLegLower ExtremityMaleMuscle, SkeletalYoung AdultConcentric strengthExtensors strengthKnee joint muscleVertical explosive force

Identifiers

PMID38077436
PMCPMC10710124
OpenAlexW4389397839

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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 OpenQuestion graph.