Because I am unskilled in interpreting emotional hunger (particulary boredom & inability to unwind) and have a high sensitivity to sugar that artificially increases my appetite. I also tried diets in the past year that enhanced binging tendencies. I am learning to cope with both. I rarely truly pig out, but because of being so inapt at recognizing the true reason behind my eating and the mind traps I set for myself I overeat ever so slightly, but quite often. I have just read the book about 5 most common excuses to blow one's eating, and only 2 did not apply to me (don't like/have time cooking and don't have time for eating properly) - yep, 48 out of 50. I've gotta learn how to think and how to eat.Then why have you not achieved it? And don't say it's because you eat like a pig or some nonsense like that. If you had undamaged health and achieving that athletic level of leanness with full nutritional load and no damage to your health were truly possible, you would be able to make your appetite match your athletic leanness.
I am not saying it is easy, I am saying it can be done.
I am aware of the professional athletes having numerous issues. Still, I see wonderfully fit women all around me, with 2, 3 kids apiece, who are not partcipating in either competitive sports, nor in over-eating orgies, nor in the never-ending locomotion. That keeps me hopeful that one day I will find the key to the nutritional and psychological lock that keeps the fat trunk firmly shut. And if I don't, well, I like this puzzle. A negative result is also a result.
Visible, well-defined deltoid and hamstring, flat stomach and no overhang on the outer thigh and inner thigh, no overhang by the knee, no muffin top spill.And define "athletic level of leanness"- it's going to vary. You go from jockeys and gymnasts to weightlifters.