I am about to start a bulking diet. What kind of cardio should I include if I'm wanting to gain mass?
Do you do any outside activities aside from the gym ie: biking, b/ball, tennis, running, soccer?
Whilst the 2 can be a bit of an opposite, if you are eating sufficiently you will most likely gain BW, a d can still keep up your cardio fitness.
That said, GPP work and or dragging, pushing, carrying for time with lighter loads can help too.
Thing to remember might be, not to jump in so much with extra work, that you get tired of it, or don't make it a regular habit along with your lifting.