Optimal repetitions and contraction duration for reliable assessment of quadriceps maximal voluntary contraction and rate of force development in older adults with cardiovascular disease.
Background: Quadriceps strength assessment is widely used in rehabilitation; however, testing protocols often rely on empirical approaches. Purpose: To identify the optimal contraction time and number of attempts needed to reliably measure muscle strength (maximal voluntary contraction, MVC) and how...
| Publicado en: | Physiotherapy Theory & Practice Vol. 42; no. 2; pp. 311 - 321 |
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| Autores principales: | , , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Feb2026
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=191332084&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 191332084 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09593985 BCJ jtl: Physiotherapy Theory & Practice issn: 09593985 maglogo: Y pubinfo: dt: Feb2026 vid: 42 iid: 2 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 191332084 188795032 191332084 191332084 10.1080/09593985.2025.2568718 191332084 ppf: 311 ppct: 10 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Optimal repetitions and contraction duration for reliable assessment of quadriceps maximal voluntary contraction and rate of force development in older adults with cardiovascular disease. aug: au: Adachi, Takuji Morishima, Chubu Nojiri, Yuta Sano, Taisei Shibata, Kenichi Kitamura, Hideki affil: Department of Integrated Health Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan sug: subj: Isometric Contraction Evaluation Quadriceps Muscles Physiology Muscle Strength Evaluation Cardiovascular Diseases In Old Age Rehabilitation, Cardiac In Old Age Resistance Training Methods Human Male Female Aged Aged, 80 and Over Descriptive Statistics Funding Source Isometric Contraction Correlation Coefficient Secondary Analysis Biomechanics Physical Performance In Old Age Interrater Reliability Body Mass Index Data Analysis Software Aged: 65+ years Aged, 80 & over Male Female ab: Background: Quadriceps strength assessment is widely used in rehabilitation; however, testing protocols often rely on empirical approaches. Purpose: To identify the optimal contraction time and number of attempts needed to reliably measure muscle strength (maximal voluntary contraction, MVC) and how quickly force is generated (rate of force development, RFD) in older adults with cardiovascular disease (CVD). Methods: We included 28 older outpatients undergoing cardiac rehabilitation (median age: 77 years). Quadriceps MVC and RFD at 0–50 ms (RFD50) and 0–100 ms (RFD100) were measured using isometric contractions. The tests examined how results varied based on 1) mean or maximum values, 2) dominant or both legs, and 3) the number of repetitions. Intra- (ICC1,1) and inter-rater correlation coefficients (ICC2,1) were evaluated across these patterns. Results: Mean to peak force was 1.73 seconds; only 2.4% required ≥3 seconds. A single trial with dominant leg yielded excellent reliability for MVC (ICC1,1 > 0.9; ICC2,1 > 0.9). For RFD50, moderate to good reliability was achieved with two repetitions of dominant leg or both sides (ICC1,1: 0.76–0.79; ICC2,1: 0.74–0.80), improving with three repetitions (ICC1,1: 0.75–0.86; ICC2,1: 0.79–0.84). For RFD100, two trials using dominant leg provided excellent reliability (ICC1,1: mean value 0.81, max value 0.89; ICC2,1: mean value 0.83, max value 0.85). Three repetitions provided consistently excellent reliability (ICC1,1: 0.88–0.93; ICC2,1: 0.86–0.92). Conclusion: Reliable MVC can be assessed with a single 3-second trial in older adults with CVD. For RFD, two repetitions, especially using the dominant leg and maximal value, provide excellent reliability. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Unknown language: English refInfo: holdings: @attributes: islocal: N |
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