NIST researchers tested markerless body tracking systems performance to support skeletal joint pose estimation for exoskeleton studies. RGB and depth markerless body tracking systems were applied for task poses wearing exoskeletons. Three types of exoskeleton were used for the test in addition to the base test, not wearing an exoskeleton. 14 PoLoTAE task poses were selected for the joint pose estimation. Ten sensor viewpoints were tested including the height and vertical view angle changes. The acceptability of body tracking results was evaluated for classifying usable data for exoskeleton performance analysis. The result includes the original images, body tracking overlaid images, representative body tracking results, and acceptability evaluation results.