For each (foreach) statement running hundreds of times.

I have a bit of code that respawns a character after death. It's still a work in progress, but is mostly functioning how I want. Instead of destroying the object I was hoping it would be more efficient to disable it and move it to a predefined point, then re-enable it. I have created a coroutine to handle this (the re-enabling part)which places all the gameobject's colliders and renderers into arrays then uses a foreach statement to re-enable them. There's a huge fps drop when this happens. I placed a debug.log line in the loop to see how often it was being called and it's anywhere from 50 - 500 times!

My understanding was that each instruction is executed once per item in the array (there are 8 renderers and 1 box collider). Renderers foreach is called 424 times (53 x 8 renderers) and colliders foreach is called 53 (53 x 1 box collider). Shouldn't it just run 8 times and 1 time?!

 IEnumerator Recreate()
     {
         yield return new WaitForSeconds(1);
         
         gameObject.transform.position = SpawnLoc;
         
         
         Component[] renderers = gameObject.GetComponentsInChildren<SkinnedMeshRenderer>();
         Component[] colliders = gameObject.GetComponentsInChildren<BoxCollider>();
         foreach(SkinnedMeshRenderer item in renderers)
         {
             item.enabled = true;
             Debug.Log ("skinned mesh renderers being turned on");
             Debug.Log ( renderers.Length);
         }
         health = maxHealth;
         mana = maxMana;
         GetComponent<LifeHUD>().justRespawned = true;
 
 
         isAlive = true;
         yield return new WaitForSeconds(3);
 
         foreach(BoxCollider item in colliders)
         {
             item.enabled = true;
             Debug.Log ("BoxColliders being turned on");
         }
 
 
     }