Evidence map›Paper›PMID 25048074›Full record

Trial reportEuropean journal of applied physiology2014

Early-phase musculoskeletal adaptations to different levels of eccentric resistance after 8 weeks of lower body training.

Kirk L English, James A Loehr, Stuart M C Lee, Scott M Smith

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in European journal of applied physiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 5 pooled it
–field-weighted citation impact
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

33 citing papers in PubMed, 5 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Maximizing Muscle Hypertrophy: A Systematic Review of Advanced Resistance Training Techniques and Methods.International journal of environmental research and public health · 2019
    Pooled it
  5. Pooled it
  6. Trial
  7. Trial
  8. Trial
  9. Review
  10. Article
  11. Article
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  15. Article
  16. Article
  17. Review
  18. Physical Rehabilitation Programs for Bedridden Patients with Prolonged Immobility: A Scoping Review.International journal of environmental research and public health · 2022
    Article
  19. Article
  20. Rehabilitation Programs for Bedridden Patients with Prolonged Immobility: A Scoping Review Protocol.International journal of environmental research and public health · 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

4 authors.

Kirk L EnglishJES Tech, LLC, 16870 Royal Crest Dr., Houston, TX, 77058, USA, kirk.english-1@nasa.gov.
James A Loehr
Stuart M C Lee
Scott M Smith

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeEccentric muscle actions are important to the development of muscle mass and strength and may affect bone mineral density (BMD). This study's purpose was to determine the relative effectiveness of five different eccentric:concentric load ratios to increase musculoskeletal parameters during early adaptations to resistance training.

methodsForty male subjects performed a supine leg press and calf press training program 3 days week(-1) for 8 weeks. Subjects were matched for pre-training leg press 1-repetition maximum strength (1-RM) and randomly assigned to one of five training groups. Concentric training load (% 1-RM) was constant across groups, but within groups, eccentric load was 0, 33, 66, 100, or 138% of concentric load. Muscle mass (dual energy X-ray absorptiometry; DXA), strength (1-RM), and BMD (DXA) were measured pre- and post-training. Markers of bone metabolism were assessed pre-, mid- and post-training.

resultsThe increase in leg press 1-RM in the 138% group (20 ± 4%) was significantly greater (P < 0.05) than the 0% (8 ± 3%), 33% (8 ± 5%) and 66% (8 ± 4%) groups, but not the 100% group (13 ± 6 %; P = 0.15). All groups, except the 0% group, increased calf press 1-RM (P < 0.05). Leg lean mass and greater trochanter BMD were increased only in the 138% group (P < 0.05).

conclusionsEarly-phase adaptations to eccentric overload training include increases in muscle mass and site-specific increases in BMD and muscle strength which are not present or are less with traditional and eccentric underload training. Eccentric overload provides a robust musculoskeletal stimulus that may benefit bedridden patients, individuals recovering from injury or illness, and astronauts during spaceflight.

Indexed as

Adaptation, PhysiologicalBone DensityMuscle StrengthResistance TrainingAdultBones of Lower ExtremityHumansLegMaleMuscle, Skeletal

Identifiers

PMID25048074

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.