Human Limit\n\nHuman Limit | Duration / Limit\nNo drinking water | 3 to 5 days\nNo food | 40 to 70 days\nWithout oxygen | 3 to 5 minutes\nNo sleep | 11 days\nExtreme cold exposure | About 30 minutes\nMaximum heart rate | 220 beats per minute\nHolding breath | Up to 24 minutes\nWalking continuously | 30 hours\nComplete isolation | 7 days\nBrain with