I am in poor shape. I am 58 years old with a bad right knee and a new left hip. Surgery weight was 528 so did very little walking, but did not get sick. Now feeling good but can't get over sick feeling when I try walking. Get light headed too. I started my purred food a week earlier and hoped for more energy. Knee barely hurts now since down 60. I might need to get into water exercises also. I also seem to sleep a lot.