Test-retest reliability of step counts with the ActivPAL™ device in common daily activities.

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Dahlgren, GunillaUmeå universitet,Institutionen för samhällsmedicin och rehabilitering (author)

Test-retest reliability of step counts with the ActivPAL™ device in common daily activities.

Article/chapterEnglish2010

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Elsevier,2010
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LIBRIS-ID:oai:DiVA.org:umu-36274
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-36274URI
https://doi.org/10.1016/j.gaitpost.2010.06.022DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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The ActivPAL device is a well-established physical activity monitor for assessment of physical activity. AIM: To investigate test-retest reliability of step counts and establish minimal detectable changes (MDC) in step count to account for intra device error over time in various physical activities. METHODS: Healthy participants (n=24, age range, 19-28 years) performed activities on two occasions, 1 week apart, in a laboratory setting; self-paced floor walking, treadmill walking at three different speeds (3.2 km/h, 4.5 km/h and 4.5 km/h with incline), treadmill jogging (8.0 km/h), stair walking and cycling on an exercise bike at three speeds (45 rpm, 60 rpm and 75 rpm). Relative reliability was calculated using intraclass correlation coefficient (ICC) and Spearman correlation. Absolute reliability was assessed using standard error of measurement (SEM) and coefficient of repeatability (CR). RESULTS: The ActivPAL showed high to very high relative reliability for treadmill walking at all speeds and stair walking, while self-paced normal floor walking showed moderate reliability. The absolute reliability was the best for treadmill walking activities, slightly increased for self-paced walking, followed by stair walking and jogging. The use of activity monitors during cycling has been questioned and our results confirm a low absolute and relative reliability. MDC values varied according to the type of activity e.g. treadmill walking 4.5 km/h (10 steps), walking on the floor (45 steps). Data loss in this study (10-13%) was higher than previously reported. CONCLUSIONS: The ActivPAL is reliable for treadmill walking, jogging and self-paced walking. MCD varies according to the activity and should be considered when establishing true change over time.

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Hälsovetenskap Sjukgymnastik hsv//swe
MEDICAL AND HEALTH SCIENCES Health Sciences Physiotherapy hsv//eng
Accelerometer; Physical activity; Reliability; ActivPAL
sjukgymnastik
Physiotherapy

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Carlsson, DanielUmeå universitet,Sjukgymnastik (author)
Moorhead, AnneHealth and Rehabilitation Sciences Research Institute, School of Health Sciences, University of Ulster, Co. Antrim, Northern Ireland, United Kingdom (author)
Häger-Ross, CharlotteUmeå universitet,Sjukgymnastik(Swepub:umu)chha0003 (author)
McDonough, Suzanne MHealth and Rehabilitation Sciences Research Institute, School of Health Sciences, University of Ulster, Co. Antrim, Northern Ireland, United Kingdom (author)
Umeå universitetInstitutionen för samhällsmedicin och rehabilitering (creator_code:org_t)

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In:Gait & Posture: Elsevier32:3, s. 386-900966-63621879-2219

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