Weighted stair climbing in mobility-limited older people
For people in wheelchairs or those who use walkers, the ability to move freely between rooms is important.
Widening hallways or doorways can help lower the risk of falls when maneuvering with a walker or a
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Generalized joint hypermobility (GJH) is a frequent entity in rheumatology with higher prevalence among women. It
is associated with chronic widespread pain, joint dislocations, arthralgia, fibromyalgia and early osteoarthritis. Stair
climbing is an important functional task and can induce symptoms in hypermobile persons. The aim of this study was
to compare ground reaction forces (GRF) and muscle activity during stair climbing in women with and without GJH. A
cross-sectional study of 67 women with normal mobility and 128 hypermobile women was performed. The hypermobile
women were further divided into 56 symptomatic and 47 asymptomatic. GRFs were measured by force plates embedded
in a six step staircase, as well as surface electromyography (EMG) of six leg muscles. Parameters derived from GRF and
EMG were compared between groups using t-test and ANOVA. For GRF no significant differences were found. EMG
showed lower activity for the quadriceps during ascent and lower activity for hamstrings and quadriceps during descent
in hypermobile women. For symptomatic hypermobile women these differences were even more accentuated. The
differences in EMG may point towards an altered movement pattern during stair climbing, aimed at avoiding high muscle
activation. However, differences were small, since stair climbing seems to be not demanding.