Hi again Wayne! Cathe looks more muscular b/c she's working her muscles as opposed to just relaxing the muscles. That's the difference. When I'm working out certain veins on my arms pop out but when I'm not flexing or working out the veins aren't as pronounced. Also I notice my skin having a pink color. My DH can't stand to look at my arms when the veins have popped out. They only pop out on my forearms btw. He makes a face that he's disgusted. It doesn't bother me that he makes a face. Women are put off by the muscular look. Most of them just want to look toned. JMO, Kathy