Article

Although physical limitations associated with transfemoral amputation (TFA) have
been studied in laboratory settings, little is known about habitual activity
within free-living environments. A retrospective analysis of 12 mo of step
activity data was performed to quantify activity levels, variations, and patterns
in 17 adults with unilateral TFA. Yearly, seasonal, and monthly average daily
step counts and coefficients of variation (CoVs) were examined to characterize
mobility. Analysis by Medicare Functional Classification Level (MFCL) was
performed to explore relationships between clinical classification and
performance. Subjects averaged 1,540 prosthetic steps/day, and activity generally
increased with MFCL. Activity between MFCL-2 and -3 subjects was not
significantly different, suggesting that ability to engage in habitual physical
activity may be similar for these groups. Relative variation (CoV) was 0.65
across subjects but was lower for those with higher activity levels. No
significant differences in CoV by group were detected. Marked seasonal and
monthly patterns in activity were identified. Warmer seasons and months generally
promoted higher activity, but peak temperatures and humidity depressed activity.
Results suggest that persons with TFA are greatly limited in regards to activity.
Further, large variations within and between subjects may challenge the
interpretation of step activity gathered over short periods of time.

Langue : ANGLAIS