I've gained a lot of muscle in the past few months and have vascularity in the upper chest a little, but that's it.
My Dad, skinny 5-7 and 129 lbs with skin and bones has big bicep vascularity. I also see lots of guys a lot smaller than me with bicep vas. I've never had it. Are some prone to not ever developing it? Is there a secret I'm missing?
I'm 5'7 and 165. I've been training for overall 5 years, and heavy last few months. I've moved from 130 to 165 in 16 weeks. My BF went from 15 to 19% (Bulking Phase).
Any insight is appreciated.