Evidence map›Paper›PMID 33354390›Full record

ArticleInternational journal of sports physical therapy2020

A FOUR-WEEK TRAINING PROGRAM WITH THE NORDIC HAMSTRING EXERCISE DURING PRESEASON INCREASES ECCENTRIC STRENGTH OF MALE SOCCER PLAYERS.

Nathalia Trevisol de Oliveira, Thales Menezes Medeiros, Karoline Baptista Vianna, Gabriel Dos Santos Oliveira, João Breno de Araujo Ribeiro-Alvares, Bruno Manfredini Baroni

Open access · diamondAbstract read
In one paragraph

Article in International journal of sports physical therapy, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.9field-weighted citation impact, top 16% 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 20 citations in OpenAlex.

  1. Pooled it
  2. Developing injury prevention programmes for ladies Gaelic football: a Delphi study.Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention · 2026
    Article
  3. Article
  4. International journal of environmental research and public health · 2022
    Article
  5. Article
  6. Article
  7. The Neuromuscular Effects of the Copenhagen Adductor Exercise: A Systematic Review.International journal of sports physical therapy · 2021
    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

6 authors at 1 institution in 1 country.

Nathalia Trevisol de OliveiraFederal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil.
Thales Menezes MedeirosFederal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil.
Karoline Baptista ViannaFederal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil.
Gabriel Dos Santos OliveiraFederal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil.
João Breno de Araujo Ribeiro-AlvaresFederal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil.
Bruno Manfredini BaroniFederal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil.
Universidade Federal de Ciências da Saúde de Porto Alegre · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe Nordic hamstring exercise (NHE) is an effective strategy to prevent hamstring strain injuries in soccer players. The current literature recommends a 10-week training program with three sessions per week, but the short preseason period and the congested schedule make difficult for high-performance soccer teams to apply the NHE as recommended. PURPOSE: The purpose of this study was to examine the effect of a pragmatic NHE training program during a four-week preseason period on eccentric knee flexor strength of high-performance soccer players. STUDY

designQuasi-experimental clinical trial.

methodsThis study included 25 under-20 male soccer players from a premier league club. They performed eight sessions of NHE (3 sets of 6-10 repetitions, twice a week) during the four-week preseason period. The eccentric knee flexor strength was evaluated during the NHE execution on a custom-made device, before and after the training program.

resultsThe NHE training program significantly increased the players' eccentric knee flexor strength in both right (Δ = 13%; p<0.001; effect size = 0.97) and left limbs (Δ = 13%; p<0.001; effect size = 0.92). Individual analysis identified 76% of the players as responders to the NHE training program (Δ = 16%; effect size = 1.60), and 24% as non-responders (Δ = 3%; effect size = 0.24).

conclusionA four-week training program with NHE performed twice a week is feasible in the real-world of high-performance soccer clubs and increases the eccentric knee flexor strength of male soccer players.

Indexed as

Eccentric trainingFootballInjury preventionSports physical therapy.

Identifiers

PMID33354390
PMCPMC7735695
OpenAlexW3055907013

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.