A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Individual scaling of accelerometry to preferred walking speed in the assessment of physical activity in older adults (2020)


Karavirta, Laura; Rantalainen, Timo; Skantz, Heidi; Lisko, Inna; Portegijs, Erja; Rantanen, Taina (2020). Individual scaling of accelerometry to preferred walking speed in the assessment of physical activity in older adults. Journals of Gerontology Series A : Biological Sciences and Medical Sciences, 75 (9), e111-e118. DOI: 10.1093/gerona/glaa142


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Karavirta, Laura; Rantalainen, Timo; Skantz, Heidi; Lisko, Inna; Portegijs, Erja; Rantanen, Taina

Lehti tai sarja: Journals of Gerontology Series A : Biological Sciences and Medical Sciences

ISSN: 1079-5006

eISSN: 1758-535X

Julkaisuvuosi: 2020

Volyymi: 75

Lehden numero: 9

Artikkelin sivunumerot: e111-e118

Kustantaja: Oxford University Press; Gerontological Society of America

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1093/gerona/glaa142

Avoin saatavuus: Julkaisukanava ei ole avoin

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/69881


Tiivistelmä

Background
Walking forms a large portion of physical activity (PA) of older adults. We assessed free-living PA using acceleration corresponding to preferred walking speed as a relative cut-point, and studied how it relates to age. We compared the relative cut-point to a common absolute cut-point of moderate-to-vigorous PA (MVPA).

Methods
444 community-dwelling adults aged 75, 80 and 85 wore an accelerometer on the thigh during a PA surveillance period and a modified six-minute walking test (6MWT) at preferred speed. Each individual’s mean acceleration (g) during the 6MWT was used as a cut-point for relative PA. Acceleration corresponding to three metabolic equivalents (METs) was used as the cut-point for absolute MVPA.

Results
When using the acceleration of preferred walking speed as a cut-point, 62 (SD 82) minutes a week of relative PA was detected, compared to 228 (163) minutes of absolute MVPA. For 96 % of the participants, the acceleration generated by their preferred walking speed exceeded the common absolute cut-point for MVPA. Absolute MVPA was lower in the older age groups, and 6MWT speed explained 22 % of its variation (p<0.001), whereas relative PA was independent of walking speed and age.

Conclusions
Preferred walking speed was a significant contributor to absolute MVPA, and those who walked the slowest accumulated the least MVPA. Assessing relative PA using the intensity of preferred walking speed as a cut-point eliminated the dependency of PA on age and walking speed, and may be a feasible scaling option to evaluate relative PA among older people.


YSO-asiasanat: fyysinen aktiivisuus; kävely; ikääntyneet; suorituskyky; mittaus

Vapaat asiasanat: aktiivisuusranneke


Liittyvät organisaatiot


Hankkeet, joissa julkaisu on tehty


OKM-raportointi: Kyllä

Alustava JUFO-taso: 3


Viimeisin päivitys 2021-02-02 klo 10:00