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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
Open AccessArticle

Leg Extensor Muscle Strength, Postural Stability, and Fear of Falling After a 2-Month Home Exercise Program in Women With Severe Knee Joint Osteoarthritis

1
Institute of Exercise Biology and Physiotherapy, University of Tartu
2
Department of Traumatology and Orthopedics, University of Tartu, Estonia
*
Author to whom correspondence should be addressed.
Medicina 2013, 49(8), 54; https://doi.org/10.3390/medicina49080054
Received: 31 May 2013 / Accepted: 30 August 2013 / Published: 4 September 2013
Background and Objective. The aim of this study was to compare the leg extensor muscle strength, the postural stability, and the fear of falling in the women with severe knee joint osteoarthritis (OA) before and after a 2-month home exercise program (HEP).
Material and Methods
. In total, 17 women aged 46–72 years with late-stage knee joint OA scheduled for total knee arthroplasty participated in this study before and after the 2-month HEP with strengthening, stretching, balance, and step exercises. The isometric peak torque (PT) of the leg extensors and postural stability characteristics when standing on a firm or a foam surface for 30 seconds were recorded. The fear of falling and the pain intensity (VAS) were estimated.
Results
. A significant increase in the PT and the PT-to-body weight (PT-to-BW) ratio of the involved leg as well as the bilateral PT and the PT-to-BW ratio was found after the 2-month HEP compared with the data before the HEP (P<0.05). The PT and the PT-to-BW ratio of the involved leg were significantly lower compared with the uninvolved leg before the HEP (P<0.05). The center of the pressure sway length (foam surface) decreased significantly after the HEP (P<0.05). Significant correlations were found between the PT of the involved leg and the bilateral PT and the fear of falling and between the PT of the involved leg and the postural sway (foam surface) before the HEP.
Conclusions. After the 2-month HEP, the leg extensor muscle strength increased and the postural sway length on a foam surface decreased. The results indicate that the increased leg extensor muscle strength improves postural stability and diminishes the fear of falling in women with latestage knee joint OA.
Keywords: osteoarthritis; home exercise program; muscle strength; balance; falls osteoarthritis; home exercise program; muscle strength; balance; falls
MDPI and ACS Style

Rätsepsoo, M.; Gapeyeva, H.; Sokk, J.; Ereline, J.; Haviko, T.; Päsuke, M. Leg Extensor Muscle Strength, Postural Stability, and Fear of Falling After a 2-Month Home Exercise Program in Women With Severe Knee Joint Osteoarthritis. Medicina 2013, 49, 54.

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