hey bro not sure if your asking me or bushmaster ,
i use intervals
walking 5mins
fast run 5mins
walk 5mins
fast run 10mins
walk 5mins

then same thing on the bike ,nothing fancy but it works for me .

for me my weight training is my cardio.HIT

I usually do the row machine for about fifteen mins pretty hard and then move to the elliptical for thirty mins. I'm not trying to burn fat so I keep my heart rate up around 160-180.

I was never a fan of cardio machines untill my knee started playing up due to too much running.

Now a massive fan of intervall training on the treadmill, I recommend it to anyone trying to improve cardio fitness, the jog and sprint (or even walk and jog)

Also the concept 2 rower is an awesome piece of kit once set up properly, Again intervall training.

Personally I live near a great trail run, down by a quite river and over open fields, I have various runs ranging from 3 to 16 miles and also great to mix it up with mountain biking.

Lets not forget circuit training for some serious fast paced cardio.

What I like about circuits is that you constantly have someone pushing you. I used to do circuits at our local boxing gym, a combination of bag work and circuit exercises. an ex boxer, proper mean old bastard took it. His favourite quote was "do it properly or do it again" The classes often ran over by about 30-45 mins lol

does sex count?? I mean i get my heart rate going for a good five ten minutes that has to be worth something...

Sex is extremely good cardio!
Personally I hate cardio so it's either sex or walking the dog!

lol i dont have a dog so its lots of sex for me

i just eat right and train hard and if i was to do cardio it would just throw cortisol in my blood stream and kill my gains... cant be having tht..

I've been married for 14 years so it's lots of walking the dog for me!!