Walking ability and its relationship to lower-extremity muscle strength in children with idiopathic inflammatory myopathies1  Karen Lohmann Siegel, PT, MA, Jeanne E Hicks, MD, Deloris E Koziol, PhD, MPH, Lynn H Gerber, MD, Lisa G Rider, MD  Archives of Physical Medicine and Rehabilitation  Volume 85, Issue 5, Pages 767-771 (May 2004) DOI: 10.1016/j.apmr.2003.07.005

Fig 1 MMT scores on a 0- to 10-point scale for each of the tested muscle groups categorized by stronger (S) or weaker (W) score (see text for explanation of stronger and weaker score). From top to bottom, muscle groups include the hip flexors (Fl), extensors (Ext), and abductors (Abd); the knee extensors; and the ankle plantarflexors (Pfl). The bars show average values with SD lines. Only the hip muscle groups showed significant differences between stronger and weaker score. Archives of Physical Medicine and Rehabilitation 2004 85, 767-771DOI: (10.1016/j.apmr.2003.07.005)

Fig 2 Average gait cycle time, stride length, and walking speed (with SDs) measured directly from the study group compared with normal values predicted from each subject’s gender, height, or age.17 Individual data directly measured from each of the 25 subjects are also plotted. Reanalyzing the data without the slowest subject minimally affected the results. Archives of Physical Medicine and Rehabilitation 2004 85, 767-771DOI: (10.1016/j.apmr.2003.07.005)

Fig 3 Walking speed as a function of the total number of muscles weaker than grade 7 on MMT. Black diamonds represent the individual data from each of the 25 subjects; the gray line is the best fit from the regression analysis. Archives of Physical Medicine and Rehabilitation 2004 85, 767-771DOI: (10.1016/j.apmr.2003.07.005)