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Foot centre of pressure and ground reaction force during quadriceps resistance exercises; a comparison between force plates and a pressure insole system.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Environmental Physiology.ORCID iD: 0000-0002-2055-3847
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Environmental Physiology.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Environmental Physiology.ORCID iD: 0000-0003-3470-5175
Karolinska Institutet.ORCID iD: 0000-0001-6475-8564
2019 (English)In: Journal of Biomechanics, ISSN 0021-9290, E-ISSN 1873-2380, Vol. 87, p. 206-210, article id S0021-9290(19)30182-4Article in journal (Refereed) Published
Abstract [en]

The study compared the centre of pressure measurements (COP) and vertical ground reaction forces (vGRF) from a pressure insole system to that from force plates (FP) during two flywheel quadriceps resistance exercises: leg press and squat. The comparison was performed using a motion capture system and simultaneous measurements of COP and vGRF from FP and insoles. At lower insole-vGRF (<250 N/insole) COP accuracy deteriorated and those data were excluded from further analysis. The insoles systematically displaced the COP slightly posteriorly and medially compared to the FP measurements. Pearson's coefficient of correlation (r) between insole- and FP-COP showed good agreement in both the anteroposterior (squat: r = 0.96, leg press: r = 0.97) and mediolateral direction (squat: r = 0.84, leg press: r = 0.90), whereas the root-mean-square errors (RMSE) were lower in the mediolateral (squat: 3.9 mm, leg press: 4.5 mm) than the anteroposterior (squat and leg press: 11.8 mm) direction. Vertical GRF was slightly overestimated by the insoles in leg press and RMSE were greater in leg press (8% of peak force) than in squat (6%). Overall, results were within the range of previous studies performed on gait. The strong agreement between insole and FP measurements indicates that insoles may replace FPs in field applications and biomechanical computations during resistance exercise, provided that the applied force is sufficient.

Place, publisher, year, edition, pages
2019. Vol. 87, p. 206-210, article id S0021-9290(19)30182-4
Keywords [en]
Centre of pressure, Force plates, Leg press, Pressure insoles, Squat
National Category
Other Mechanical Engineering
Research subject
Medical Technology
Identifiers
URN: urn:nbn:se:kth:diva-250891DOI: 10.1016/j.jbiomech.2019.03.004ISI: 000465051200028PubMedID: 30905404Scopus ID: 2-s2.0-85063046754OAI: oai:DiVA.org:kth-250891DiVA, id: diva2:1314013
Note

QC 20190625

Available from: 2019-05-07 Created: 2019-05-07 Last updated: 2019-06-25Bibliographically approved

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Publisher's full textPubMedScopushttps://www.sciencedirect.com/science/article/pii/S0021929019301824?via%3Dihub

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Jönsson, MariaMunkhammar, TobiasNorrbrand, LenaBerg, Hans E
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