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The mechanical loading and muscle activation of four common exercises used in osteoporosis prevention for early postmenopausal women

Montgomery, Gallin, Abt, Grant, Dobson, Catherine, Smith, Tina, Evans, Will and Ditroilo, Massimiliano (2018) The mechanical loading and muscle activation of four common exercises used in osteoporosis prevention for early postmenopausal women. Journal of Electromyography and Kinesiology, 44. pp. 124-131. ISSN 1050-6411

Item Type: Article

Abstract

High impact exercise can reduce postmenopausal bone loss, however stimulus frequency (loading cycles per second) can affect osteogenesis. We aimed to examine the effect of stimulus frequency on the mechanical loading of four common osteoporosis prevention exercises, measuring body acceleration and muscle activation with accelerometry and electromyography (EMG), respectively. Fourteen early postmenopausal women completed randomised countermovement jumps (CMJ), boxdrops (BD), heel-drops (HD) and stamp (STP) exercises for continuous and intermittent stimulus frequencies. Sacrum accelerometry and surface electromyography (EMG) of four muscles were recorded. CMJ (mean ± SD: 10.7 ± 4.8 g & 10.0 ± 5.0 g), BD (9.6 ± 4.1 g & 9.5 ± 4.0 g) and HD (7.3 ± 3.8 g & 8.6 ± 4.4 g) conditions generated greater peak acceleration than STP (3.5 ± 1.4 g & 3.6 ± 1.7 g) across continuous and intermittent trials. CMJ and BD generated greater acceleration gradients than STP across continuous and intermittent trials. CMJ generated greater rectus femoris EMG than all other exercises, CMJ and BD generated
greater semitendinosus and tibialis anterior EMG than HD across continuous and intermittent trials. CMJ and BD provide greater peak acceleration than STP and remain similar during different stimulus frequencies. CMJ, BD and HD may exceed STP in maintaining postmenopausal bone health

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More Information

Depositing User: Will Evans

Identifiers

Item ID: 10273
Identification Number: https://doi.org/10.1016/j.jelekin.2018.12.004
ISSN: 1050-6411
URI: http://sure.sunderland.ac.uk/id/eprint/10273
Official URL: https://www.sciencedirect.com/science/article/pii/...

Users with ORCIDS

ORCID for Will Evans: ORCID iD orcid.org/0000-0003-2111-5408

Catalogue record

Date Deposited: 14 Jan 2019 13:42
Last Modified: 18 Dec 2019 16:07

Contributors

Author: Will Evans ORCID iD
Author: Gallin Montgomery
Author: Grant Abt
Author: Catherine Dobson
Author: Tina Smith
Author: Massimiliano Ditroilo

University Divisions

Faculty of Health Sciences and Wellbeing
Faculty of Health Sciences and Wellbeing > School of Nursing and Health Sciences

Subjects

Sciences > Health Sciences
Sciences > Sport Sciences

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