What are your favourite methods of interval training for cardio and conditioning?
I really like this pyramid drill on the rowing machine. It only takes about ten minutes but its intense enough to really build some power.
30secs hard/30secs light
60secs hard/60secs light
90 hard/90 light
So you work up the pyramid then back down. 30 seconds is short enough to be all out, 90 seconds is a test of mental determination but still short enough to be sprinted, and then you work down. If you have enough energy it can be done again after a few minutes light.
How do you like to do intervals and what purpose do they serve?
Of all the stuff I've done, I like 30:30 kettlebell swings the most. I've done 8 Seconds of Doom, Tabata, and plenty of other more "normal" interval schemes using a treadmill, elliptical, recumbent/upright bike, rower, and jump rope but the swings tear my ass up harder than anything else for general conditioning.
I just did 12 minutes of 30:30 swings with a 16kg bell yesterday and, when I was done, my heartrate hit 204bpm. It was glorious.
If one person can do something, anyone can learn to do it.
Do what you've always done and get what you've always gotten.
There is no failure, only feedback.
"Journey of 1000 miles starts with a single step".--Lao Tzu