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Background  Walker orthosis are frequently prescribed as they are removable to allow wound control, body care and physiotherapy and are adaptable to the soft tissue conditions. The prerequisite for successful treatment with any walker orthosis is a correct use by the patient. Therefore, the aim of this study was to investigate patients’ handling of a commonly used walker.    Methods  Prospective observational study analyzing the applicability of a walker orthosis in different cohorts with varying age and level of activity. Volunteers were recruited from a mountain-biking-team (Sport), a cardiovascular-health-sports-group (Cardio) and a retirement home (Senior). The correct application was assessed following initial training (t0) and one week later (t1). Outcome parameters were an Application Score, strap tightness, vertical heel lift-off and subjective judgement of correct application.    Results  Thirty-three volunteers, 11 Sports group (31 ± 7a), 12 Cardio group (59 ± 11a), 10 Senior group, (82 ± 5a) were enrolled. No differences for any parameter could be observed between t0 and t1. Age showed a moderate correlation for all outcome parameters and the cohort influenced all variables. The Senior group presented significant inferior results to the Sport- and Cardio group for the Application Score ( p  = 0.002- p  < 0.001) and strap tightness ( p  < 0.001). Heel lift-off was significantly inferior in the Cardio- and Senior- compared to the Sport group ( p  = 0.003- p  < 0.001). 14% in the Sport-, 4% in the Cardio- and 83% in the Senior group achieved less than 9 points in the Application Score – which was considered insufficient. However, out of these 90% believed the application to be correct.    Conclusions  The elderly cohort living in a retirement home demonstrated an impaired handling of the walker orthosis. Further, participants were incapable to self-assess the correct handling. These aspects should be respected when initiating treatment with a walker orthosis.    Trial registration  Retrospectively registered on the 16th of February 2018: # DRKS00013728  on DRKS.    Electronic supplementary material  The online version of this article (10.1186/s12891-018-2366-2) contains supplementary material, which is available to authorized users.

Influence of age and level of activity on the applicability of a walker orthosis - a prospective study in different cohorts of healthy volunteers