for trails:
trail_l_arm for the left arm trail
trail_r_arm for the right arm trail
trail_l_leg for the left leg trail
trail_r_leg for the right leg trail
for joints:
j_neck
j_chest
j_lumbar
j_abs
j_l_pecs
j_r_pecs
j_l_shoulder
j_r_shoulder
j_l_elbow
j_r_elbow
j_l_wrist
j_r_wrist
j_l_glute
j_r_glute
j_l_hip
j_r_hip
j_l_knee
j_r_knee
j_l_ankle
j_r_ankle