I have said for years I would never be on a machine as I hate them. I like heavy bag cardio, sparring, ropes in the MMA room for my cardio or at home with BOB, but even with 100's of lbs at the base with a BOB, if you are an adult you will spend as much time moving it back in position as you do hitting, kneeing, kicking, it, etc. This is not tough guy talk - I like BOB and the HB as they don't hit back lol.
I now have to eat my words going to a gym (with work - I was working out at home for years). They have a large MMA room, heavy bag, focus mitts, pads, heavy ropes, and multiple areas for people who like to 'air box', and several elliptical bikes. The bikes give your legs a great workout and you are sort of, depending how you set the seat up, constantly doing a light push workout and punching non stop left hand to right hand. Your spine stabilization muscles get a little workout as I notice you turn slightly with each revolution as your arms move out like a punch. I love the Rogue machine the best - I started at 15 minutes and am able to go hard for double that now after 2 months.
So, if my job was physical like
@storman - no way could I workout and then do cardio after. I don't do it everyday but for many of the guys who are into boxing/kickboxing - it is a great machine.
I am sure there are others that prefer other machines and each to their own, but this is the only machine I will use for cardio and I enjoy it (other than sparring/heavy bag session/and leg day is like a cardio session) and I can also tell I don't get winded as quickly with a heavy bag session and I like to believe my hands are getting faster/hit harder, but I could be fooling myself.
Anyway - no right answer but if you
eat enough calories of healthy food, I fail to see how cardio will hurt you if you take the time (like benching) to build up.
There is a debate that cardio can hurt muscle growth and I absolutely disagree - unless you burn off 1000 calories and do not replace it with healthy/repairing food.
Just saw this thread today - so I will eat my words, I love the elliptical bike.