This is 100% true. As hard as it is when 0500 comes with two small children and a house to take care of all day (and 1/2 the night), within 15 minutes I am feeling great. And it gets easier every morning! The mental and physical changes are more than worth it. (Caveat: If you're not getting a solid night's sleep of 6 hours or more, this admittedly won't work well).