My DH took up cycling when we started our swaying days in Jan 2012 although I think he actually converted a while before that as I had been researching swaying since I was pg with ds2 in 2010/11. He has stopped all weights/press ups/sit ups completely. Sometimes he does treadmill and elliptical but I mainly cycling. Every man I knows who cycles loads has girls!
Also before both boys he used to take loads of protein shakes etc before or after the gym to increase his muscle mass! Again I stopped all of that when I researched swaying. Now his 'protein' comes in the form of soy milk which he drinks every day.