Volume 29, Issue 4 p. 271-276

Test–retest reliability of the IDEEA system in the quantification of step parameters during walking and stair climbing

Mark L. Gorelick

Mark L. Gorelick

Department of Kinesiology, San Francisco State University, San Francisco, CA, USA

Search for more papers by this author
Mario Bizzini

Mario Bizzini

Neuromuscular Research Laboratory, Schulthess Clinic, Zurich, Switzerland

Search for more papers by this author
Nicola A. Maffiuletti

Nicola A. Maffiuletti

Neuromuscular Research Laboratory, Schulthess Clinic, Zurich, Switzerland

Search for more papers by this author
Jeannette Petrich Munzinger

Jeannette Petrich Munzinger

Neuromuscular Research Laboratory, Schulthess Clinic, Zurich, Switzerland

Search for more papers by this author
Urs Munzinger

Urs Munzinger

Neuromuscular Research Laboratory, Schulthess Clinic, Zurich, Switzerland

Search for more papers by this author
First published: 10 June 2009
Citations: 32
Mark L. Gorelick, Department of Kinesiology, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132, USA E-mail: [email protected]

Summary

The aim of this investigation was to evaluate the inter- and intra-session reliability of spatio-temporal gait variables collected during walking and stair climbing with the Intelligent Device for Energy Expenditure and physical Activity (IDEEA) accelerometer-based system. Eighteen healthy subjects (10 men, 8 women) completed a standardized indoor circuit comprised of walking and stair climbing. Intra-and inter-session reliability was investigated for several pertinent spatio-temporal gait variables using intraclass correlations [ICC (3,1)]. Intra-session reliability during walking showed a high reliability of the IDEEA with ICCs ranging between 0·84 (number of steps) and 0·97 (single limb support/double limb support). The ICCs for stair climbing were slightly lower than those during walking with values ranging between 0·74 (step duration) and 0·92 (number of steps). Inter-session reliability during walking showed a high reliability of the IDEEA between all trials, with values ranging between 0·87 (speed) to 0·98 (step duration). The ICCs of stair climbing were again lower than those during walking with values ranging from 0·64 (swing duration) to 0·79 (number of steps). The IDEEA accelerometer-based system provided a highly reliable measurement of spatio-temporal variables, in healthy subjects, during walking with moderately reduced correlations during stair climbing.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.