Experimental science usual support the theorems and praxis developed in the red pill sphere. So here is a paper where the lion share of male physical attractiveness can be explained by upper body strength and most of the remainder by not being fat nor short. Two of three factors that are in your control.

Cues of upper body strength account for most of the variance in men's bodily attractiveness | Proceedings of the Royal Society B: Biological Sciences (royalsocietypublishing.org)