Evidence map›Paper›PMID 33569415›Full record

ArticleAnnals of translational medicine2021

Markers of muscle damage and strength performance in professional football (soccer) players during the competitive period.

Vladimir Khaitin, Eduard Bezuglov, Artemii Lazarev, Sergey Matveev, Olga Ivanova, Nicola Maffulli, Evgeny Achkasov

Open access · diamondAbstract read
In one paragraph

Article in Annals of translational medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
2.1field-weighted citation impact, top 14% 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

5 citing papers in PubMed, 16 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.

Vladimir KhaitinPavlov First Saint-Petersburg State Medical University, Saint-Petersburg, Russia.
Eduard BezuglovSechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.
Artemii LazarevSechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.
Sergey MatveevPavlov First Saint-Petersburg State Medical University, Saint-Petersburg, Russia.
Olga IvanovaLomonosov Moscow State University, Moscow, Russia.
Nicola MaffulliDepartment of Musculoskeletal Disorders, Faculty of Medicine and Surgery, University of Salerno, Salerno, Italy.
Evgeny AchkasovSechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.
First Pavlov State Medical University of St. Petersburg · RUSechenov University · RULomonosov Moscow State University · RUMile End Hospital · GBMoscow Witte University · RU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe present study investigated the impact of competitive soccer on the short-term changes in isometric strength of the adductor muscle group during the competitive season.

methodsIn this cohort study we evaluated the association between a serum marker of muscle damage [creatine phosphokinase (CPK)] and isometric strength of the adductor muscles of the hip in 30 professional football players (age: 26.7±2.9 years) during two seasons of the national top-level championship. Serum CPK level was determined the day before the match, 12-20, 36-48, 60-72 h after the match. The maximum voluntary isometric contraction force of the adductor muscles complex was determined immediately after having taken blood samples.

resultsThere was evidence of a statistically significant positive association between age, body mass index (BMI), percentage of body fat, and muscle strength, and between weight and muscle strength. There was evidence of a statistically significant negative association between the level of CPK and the maximum isometric strength of the adductors of soccer players. Changes in CPK levels were associated with the muscle strength recovery trend (P<0.001). The strength/CPK ratio at different time points had a U-shaped curve.

conclusionsExercise induced muscle damage significantly affects the strength of the adductor muscle group of professional soccer players during the competitive period. The lower the CPK level, the greater the athletes' strength at a given time point. Also, the greater the decrease in CPK level, the greater the rate of strength restoration.

Indexed as

adductorsCreatine kinasefootballisometric contractionmuscle strength

Identifiers

PMID33569415
PMCPMC7867942
OpenAlexW3110786892

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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 OpenQuestion graph.