[speakeasy]

I've found there's nothing more effective for me than the stairmaster machine. And I don't mean the one you pump your feet up and down on, but the one that's like a never-ending escalator. Set that on a brisk pace for 30 minutes and you're good. 3 or 4 days a week. I also do uphill cycling when I need a good cardio run. High intensity martial arts are great too. You can take up some Krav, BJJ or boxing.