RRA double limb support with only one force plate

[Park SangJun]

hi
I have one question.
Our lab only has one force plate.
When we conducted a walking experiment, we instructed the subject to step on the force plate with their right foot.
So we don't have left foot ground reaction force data.
In this situation, I think the RRA results are correct in the single limb support phase of the right foot, but I don't know if the RRA results are correct in the double limb support phase where there is only the GRF of the right foot and no GRF of the left foot.
Please answer.

[Thomas Uchida]

You are correct: RRA should not be run over time intervals where GRFs were applied to the left foot in the experiment but were not measured.