I could barely walk to my secret hideout in the old Karakura Train Station. It took me about 30 minutes since my reiatsu was almost spent. Releasing that much reiatsu at one time was a very tiring task. My body had healed up mostly while I was in Shikai, but I still needed to resk. I went into the Train Station, and headed straight for the secret door. Sure enough it appeared before me and I walked through.