Measuring physical fitness in Persons with Severe/Profound ...
Measuring physical fitness in Persons with Severe/Profound ...
Measuring physical fitness in Persons with Severe/Profound ...
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In order to confirm the validity of the aSRT [12], results of both the treadmill and aSR testshould be compared to a golden standard [18]. Midgley et al. [19] reviewed available literatureregard<strong>in</strong>g the verification phase follow<strong>in</strong>g a graded exercise test and suggested perform<strong>in</strong>g aSupra Maximal Block Test (SMBT) to set a gold standard for HR peakon an <strong>in</strong>dividual basis [19]. Ifthe heart rate of the SMBT differs by no more than two beats from the HR peakreached dur<strong>in</strong>g thecorrespond<strong>in</strong>g aSRT [12], the exertion dur<strong>in</strong>g the aSRT [12] is scored as maximal [19].The purpose of this study thus is twofold; it seeks to determ<strong>in</strong>e the feasibility, validity andtest-retest reliability of a graded treadmill test (GXT) for participants <strong>with</strong> SIMD and GMFCS levelI, us<strong>in</strong>g a Supra Maximal Block Test (SMBT) as golden standard. By do<strong>in</strong>g so, this study will alsoassess whether the formula of Fernhall overestimates HR peak<strong>in</strong> persons <strong>with</strong> SIMD.MethodsParticipantsThe participants were recruited from a residential care facility <strong>in</strong> the Netherlands, which ishome to 200 persons <strong>with</strong> severe or profound <strong>in</strong>tellectual and visual disabilities. Only personsfunction<strong>in</strong>g at GMFCS-I level were <strong>in</strong>cluded, because Wan<strong>in</strong>ge et al. have <strong>in</strong>dicated the aSRTperformed over ground is only reliable for persons <strong>with</strong> GMFCS level I [12]. Probably due tovisual impairments, the participants were not able to run and jump spontaneously [5, 7, 12].Subsequently, classification was adjusted so as to <strong>in</strong>clude people <strong>with</strong> GMFCS-I who were able to<strong>in</strong>crease walk<strong>in</strong>g speed [12].A total of 30 participants were recruited (17 males, 13 females), all classified as GMFCS-I.Twenty-three participants had a severe ID and seven a profound ID. Some could not walk alonebecause of a visual impairment. Table 1 presents the participants’ characteristics.Table 1. PopulationMale (n=17) Female (n=13) Total (n=30)Age Mean (SD) 40 (11) 42 (11) 41 (11)ID<strong>Severe</strong> ID(20≤IQ