Step-rate thresholds for physical activity intensity in persons with multiple sclerosis

Stamatis Agiovlasitis, Robert W Motl

Research output: Contribution to journalArticlepeer-review

Abstract

This study examined whether the relationship between metabolic equivalent units (METs) and step-rate is altered in persons with multiple sclerosis (MS) and developed step-rate thresholds for activity intensity for these persons. Participants were 24 persons with MS (20 women; age = 44 ± 12) and 24 healthy persons without MS (20 women; age = 41 ± 11). The MS group was divided using the 12-item MS Walking Scale (MSWS-12) into two walking impairment subgroups: (a) minimal (n = 13, MSWS-12 ≤ 12.5) and (b) mild-moderate (n = 11, MSWS-12 > 12.5). METs were measured with spirometry and step-rate with hand-tally. Steprate, height, group, the step-rate by group interaction, and the square of step-rate significantly predicted METs. At a given height, the step-rate thresholds at 3 and 6 METs were lower for persons with minimal impairment than persons without MS and even lower for persons with mild-moderate impairment. The relationship between METs and step-rate is altered in persons with MS, lowering their step-rate thresholds for activity intensity, especially for persons with MS who have higher levels of walking impairment.

Original languageEnglish (US)
Pages (from-to)4-18
Number of pages15
JournalAdapted Physical Activity Quarterly
Volume31
Issue number1
DOIs
StatePublished - Jan 1 2014

Keywords

  • Multiple sclerosis
  • Physical activity assessment
  • Step-rate

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation

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