Evidence map›Paper›PMID 33004970›Full record

ArticleScientific reports2020

Relation between leg extension power and 30-s sit-to-stand muscle power in older adults: validation and translation to functional performance.

Julian Alcazar, Rikke S Kamper, Per Aagaard, Bryan Haddock, Eva Prescott, Ignacio Ara, Charlotte Suetta

Abstract readValidation Study
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 1 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

68 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  18. Motor performance and aging in males and females.Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology · 2025
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8 more citing papers are in PubMed but not listed here.

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.

Julian AlcazarGENUD Toledo Research Group, Universidad de Castilla-La Mancha, Toledo, Spain.
Rikke S KamperGeriatric Research Unit, Department of Geriatric and Palliative Medicine, Bispebjerg-Frederiksberg University Hospital, Copenhagen, Denmark.
Per AagaardInstitute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.
Bryan HaddockDepartment Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet-Glostrup University Hospital, Copenhagen, Denmark.
Eva PrescottDepartment of Cardiology, Bispebjerg-Frederiksberg University Hospital, Copenhagen, Denmark.
Ignacio AraGENUD Toledo Research Group, Universidad de Castilla-La Mancha, Toledo, Spain.
Charlotte SuettaGeriatric Research Unit, Department of Geriatric and Palliative Medicine, Bispebjerg-Frederiksberg University Hospital, Copenhagen, Denmark. charlotte.suetta@regionh.dk.

Funding

CRISPR/Cas9 screen to identify mediators of cellular senescenceZIAAG000477 · NIA · NATIONAL INSTITUTE ON AGING · PI DE, SUPRIYO · 2020 to 2020
$87k
6 · The paper itself

Abstract

This study aimed to assess the validity and functional relevance of a standardized procedure to assess lower limb muscle power by means of the 30-s sit-to-stand (STS) test when compared to leg extension power (LEP), traditional STS performance and handgrip strength. A total of 628 community-dwelling older subjects (60-93 years) from the Copenhagen Sarcopenia Study were included. Physical performance was assessed by the 30-s STS and 10-m maximal gait speed tests. Handgrip strength and LEP were recorded by a hand-held dynamometer and the Nottingham power rig, respectively. STS muscle power was calculated using the subjects' body mass and height, chair height and the number of repetitions completed in the 30-s STS test. We found a small albeit significant difference between LEP and unilateral STS power in older men (245.5 ± 88.8 vs. 223.4 ± 81.4 W; ES = 0.26; p < 0.05), but not in older women (135.9 ± 51.9 vs. 138.5 ± 49.6 W; ES = 0.05; p > 0.05). Notably, a large positive correlation was observed between both measures (r = 0.75; p < 0.001). Relative STS power was more strongly related with maximal gait speed than handgrip strength, repetition-based STS performance and relative LEP after adjusting for age (r = 0.53 vs 0.35-0.45; p < 0.05). In conclusion, STS power obtained from the 30-s STS test appeared to provide a valid measure of bilateral lower limb power and was more strongly related with physical performance than maximal handgrip strength, repetition-based STS performance and LEP.

Indexed as

Physical Functional PerformanceAgedAged, 80 and overAgingExercise TestFemaleGeriatric AssessmentHand StrengthHumansLegMaleMiddle AgedMuscle, SkeletalMuscle StrengthPosture

Identifiers

PMID33004970
PMCPMC7529789

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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.