It takes years of specific, dedicated training to pile on that much muscle. CrossFit will not make you big and bulky – but it will make you strong. This is usually a question asked by women – the female body is not designed to react that way to heavy weights. Put out of your head any pictures of female body builders – these ladies tend to look masculine because they train and ‘supplement’ in a way designed to increase muscle size. We don’t do either of these.