diff --git a/fixtracks/widgets/skeleton.py b/fixtracks/widgets/skeleton.py
index 6e7e80a..13c8f44 100644
--- a/fixtracks/widgets/skeleton.py
+++ b/fixtracks/widgets/skeleton.py
@@ -41,13 +41,8 @@ class Skeleton(QGraphicsRectItem):
 
     @property
     def length(self):
-        dist = 0.0
-        for i in range(1, len(self.bodyaxis)):
-            si = self.bodyaxis[i-1]
-            ei = self.bodyaxis[i]
-            sk = self._keypoints[si, :]
-            ek = self._keypoints[ei, :]
-            dist += np.sqrt((ek[0] - sk[0])**2 + (ek[1] - sk[1])**2)
+        bodykps = self._keypoints[self.bodyaxis, :]
+        dist = np.sum(np.sqrt(np.sum(np.diff(bodykps, axis=0)**2, axis=1)), axis=0)
         return dist
 
     # def mousePressEvent(self, event):