Instrumented Assessment of Physical Activity Is Associated With Muscle Function but Not With Muscle Mass in a General Population

Anna G.M. Rojer, Esmee M. Reijnierse, Marijke C. Trappenburg, Rob C. van Lummel, Martijn Niessen, Kim S. van Schooten, Mirjam Pijnappels, Carel G.M. Meskers, Andrea B. Maier

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)


OBJECTIVES: Self-reported physical activity has shown to affect muscle-related parameters. As self-report is likely biased, this study aimed to assess the association between instrumented assessment of physical activity (I-PA) and muscle-related parameters in a general population.

METHOD: Included were 156 young-to-middle-aged and 80 older community-dwelling adults. Seven days of trunk accelerometry (DynaPort MoveMonitor, McRoberts B.V.) quantified daily physical activity (i.e., active/inactive duration, number and mean duration of active/inactive periods, and number of steps per day). Muscle-related parameters included muscle mass, handgrip strength, and gait speed.

RESULTS: I-PA was associated with handgrip strength in young-to-middle-aged adults and with gait speed in older adults. I-PA was not associated with muscle mass in either age group.

DISCUSSION: The association between I-PA and muscle-related parameters was age dependent. The lack of an association between I-PA and muscle mass indicates the relevance of muscle function rather than muscle mass.

Original languageEnglish
Pages (from-to)1462-1481
Number of pages20
JournalJournal of aging and health
Issue number9
Early online date24 Jul 2017
Publication statusPublished - Oct 2018


  • Journal Article
  • activity monitoring
  • aged
  • motor activity
  • muscle strength
  • physical performance
  • sarcopenia

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