diff --git a/src/Jitter2/World.Step.cs b/src/Jitter2/World.Step.cs
index 5a448b5f..e4d64323 100644
--- a/src/Jitter2/World.Step.cs
+++ b/src/Jitter2/World.Step.cs
@@ -327,8 +327,6 @@ private unsafe void IterateSmallConstraintsCallback(Parallel.Batch batch)
             ref RigidBodyData b1 = ref constraint.Body1.Data;
             ref RigidBodyData b2 = ref constraint.Body2.Data;
 
-            AssertConstraint(ref b1, ref b2);
-
             if (constraint.Iterate == null) continue;
 
             LockTwoBody(ref b1, ref b2);
@@ -371,8 +369,6 @@ private unsafe void IterateConstraintsCallback(Parallel.Batch batch)
             ref RigidBodyData b1 = ref constraint.Body1.Data;
             ref RigidBodyData b2 = ref constraint.Body2.Data;
 
-            AssertConstraint(ref b1, ref b2);
-
             if (constraint.Iterate == null) continue;
 
             LockTwoBody(ref b1, ref b2);
@@ -391,8 +387,6 @@ private void IterateContactsCallback(Parallel.Batch batch)
             ref RigidBodyData b1 = ref c.Body1.Data;
             ref RigidBodyData b2 = ref c.Body2.Data;
 
-            AssertConstraint(ref b1, ref b2);
-
             LockTwoBody(ref b1, ref b2);
             c.Iterate();
             UnlockTwoBody(ref b1, ref b2);
@@ -418,23 +412,6 @@ private void DetectCollisionsCallback(Parallel.Batch batch)
         }
     }
 
-    private void AssertConstraint(ref RigidBodyData rb1, ref RigidBodyData rb2)
-    {
-        Debug.Assert(!(rb1.IsStaticOrInactive && rb2.IsStaticOrInactive));
-
-        if (rb1.IsStatic)
-        {
-            Debug.Assert(rb1.InverseMass == 0.0f);
-            Debug.Assert(rb1.InverseInertiaWorld.Equals(JMatrix.Zero));
-        }
-
-        if (rb2.IsStatic)
-        {
-            Debug.Assert(rb2.InverseMass == 0.0f);
-            Debug.Assert(rb2.InverseInertiaWorld.Equals(JMatrix.Zero));
-        }
-    }
-
     private void AssertNullBody()
     {
         ref RigidBodyData rigidBody = ref NullBody.Data;
@@ -458,6 +435,17 @@ private void ForeachActiveShape(bool multiThread)
 
     private void ForeachActiveBody(bool multiThread)
     {
+#if DEBUG
+        foreach (var body in bodies)
+        {
+            if (body.IsStatic)
+            {
+                System.Diagnostics.Debug.Assert(MathHelper.UnsafeIsZero(body.Data.InverseInertiaWorld));
+                System.Diagnostics.Debug.Assert(body.Data.InverseMass == 0.0f);
+            }
+        }
+#endif
+
         if (multiThread)
         {
             bodies.ParallelForBatch(256, updateBodies);