Effect of direction of motion on joint and body kinematics curves
Posted: Thu Nov 22, 2018 3:06 am
I have biomechanical data from two trials (ascent and descent) recorded while subject was moving in opposite directions. Since, I am interested in the ankle angle and shank angular velocity of the two trials, I run the IK and Analysis tool and plotted the resultant curves (see attached). I am a bit confused if I need to flip the curves for on of the trials for a valid comparison between the two trials. If so, do I need to flip the curves for both joint angles and body kinematics? I compared my ankle angle curves (without flipping any) with (Riener, 2002) and found that they look similar. However, the shank angular velocity curves (for which I could not find any literature for comparison) for the two trials seems to follow different signs and this may be due to the effect of movement direction. I am not able to figure this out. Could you please advice me on this?
References:
Riener, Robert, Marco Rabuffetti, and Carlo Frigo. "Stair ascent and descent at different inclinations." Gait & posture 15.1 (2002): 32-44.
References:
Riener, Robert, Marco Rabuffetti, and Carlo Frigo. "Stair ascent and descent at different inclinations." Gait & posture 15.1 (2002): 32-44.