diff --git a/treadmill_gait_analysis/function/gait_analysis.py b/treadmill_gait_analysis/function/gait_analysis.py
index 2dc542f..6f5f1d4 100644
--- a/treadmill_gait_analysis/function/gait_analysis.py
+++ b/treadmill_gait_analysis/function/gait_analysis.py
@@ -74,8 +74,8 @@ def __init__(self, session_dir, trial_name, leg='auto',
                 self.markerDict['markers'][marker] = self.markerDict['markers'][marker][:self.idx_trim_end,:]
             self.coordinateValues = self.coordinateValues.iloc[:self.idx_trim_end]
         
-        # Rotate marker data so x is forward (not using for now, but could be useful for some analyses).
-        # self.rotation_about_y, self.markerDictRotated = self.rotate_x_forward()
+        # Rotate marker data so x is forward
+        self.rotation_about_y, self.markerDictRotated = self.rotate_x_forward()
 
         # Segment gait cycles.
         self.gaitEvents = self.segment_walking(n_gait_cycles=n_gait_cycles,leg=leg)
@@ -257,14 +257,14 @@ def compute_step_length(self,return_all=False):
         step_lengths = {}
         
         step_lengths[contLeg.lower()] = (
-            - self.markerDictRotatedPerGaitCycle['markers'][leg + '_calc_study'][self.gaitEvents['ipsilateralIdx'][:,:1],0] + 
-            self.markerDictRotatedPerGaitCycle['markers'][contLeg + '_calc_study'][self.gaitEvents['contralateralIdx'][:,1:2],0] + 
+            - self.markerDictRotated['markers'][leg + '_calc_study'][self.gaitEvents['ipsilateralIdx'][:,:1],0] + 
+            self.markerDictRotated['markers'][contLeg + '_calc_study'][self.gaitEvents['contralateralIdx'][:,1:2],0] + 
             self.treadmillSpeed * (self.gaitEvents['contralateralTime'][:,1:2] -
                                    self.gaitEvents['ipsilateralTime'][:,:1]))
         
         step_lengths[leg.lower()]  = (
-            self.markerDictRotatedPerGaitCycle['markers'][leg + '_calc_study'][self.gaitEvents['ipsilateralIdx'][:,2:],0] - 
-            self.markerDictRotatedPerGaitCycle['markers'][contLeg + '_calc_study'][self.gaitEvents['contralateralIdx'][:,1:2],0] + 
+            self.markerDictRotated['markers'][leg + '_calc_study'][self.gaitEvents['ipsilateralIdx'][:,2:],0] - 
+            self.markerDictRotated['markers'][contLeg + '_calc_study'][self.gaitEvents['contralateralIdx'][:,1:2],0] + 
             self.treadmillSpeed * (-self.gaitEvents['contralateralTime'][:,1:2] +
                                    self.gaitEvents['ipsilateralTime'][:,2:]))