I am 33 yrs old, why does it seem like eating less was easier when I was in my 20's? Is thier a biological or metabolic reason for this? This totally perplexes me. I get 1 hour of cardiovasucular excercise 3 to 4 times per week but it is not having the same effect on my figure as it did when I was just 2 years younger. What should I do about this?