Let how you feel and look be your guide. Are you fit? If you cycle regularly and feel good when you do, you're fine. Are you fat? Stand in front of the mirror and look at yourself. that should tell you something. If you're not all flabby and are fit, you're just the way you should be. I'm 5'7" at 162 and am just fine. when I start using formulas, I see that I am slightly overweight, yet people consider me to be quite fit looking. And I am fit. Body type and conditioning matter more than anything.