Mean (SD) of six gait variables for patients with Parkinson’s disease (PD) and for controls for each instructional set

PDControls
Left step length (m)Natural walk0.85 (0.27)1.19 (0.19)
Swing arms0.99 (0.31)1.41 (0.24)
Count aloud0.98 (0.32)1.31 (0.20)
Large steps1.26 (0.20)1.56 (0.15)
Walk fast1.08 (0.41)1.52 (0.21)
Right step length (m)Natural walk0.83 (0.27)1.17 (0.19)
Swing arms0.98 (0.29)1.37 (0.23)
Count aloud0.95 (0.30)1.31 (0.20)
Large steps1.33 (0.30)1.62 (0.21)
Walk fast1.06 (0.39)1.51 (0.20)
Velocity (m/s)Natural walk0.77 (0.23)1.02 (0.23)
Swing arms0.93 (0.30)1.22 (0.22)
Count aloud0.88 (0.31)1.18 (0.29)
Large steps1.16 (0.36)1.35 (0.26)
Walk fast1.27 (0.38)1.70 (0.37)
Shoulder excursion (degrees)Natural walk28 (24)24 (11)
Swing arms61 (38)52 (21)
Count aloud41 (27)27 (13)
Large steps54 (47)36 (24)
Walk fast36 (31)43 (18)
Elbow excursion (degrees)Natural walk3 ( 2)7 ( 6)
Swing arms8 ( 6)21 ( 9)
Count aloud7 ( 3)27 (27)
Large steps10 ( 6)14 ( 9)
Walk fast16 ( 8)27 (10)
Cadence (steps/min)Natural walk117 (29)103 (11)
Swing arms112 (12)103 ( 9)
Count aloud108 (16)109 (14)
Large steps94 (13)99 (11)
Walk fast153 (46)133 (18)