Mahboob, I'm not excited about the icons we're using for Core (neither was Rose) (I really like the Satellite icons we have)

How about we changed the circles to barbells (as in weight lifting). Varying either the size of the weights at each end or the number of weights at each end to reflect Underweight, Regular Weight, or Overweight.  Or even curve the bar depending on the weight (see attached file).

We would also place (as with Satellite) a letter U, R, O under the barbell. 

Could you mockup a few choices?  Or suggest alternative ideas! 

Thanks,
Raymond