Way more. I foolishly attempted to do the so-called "Holy Grail" of Burpee workouts with descending sets from 20 to 1 (20, 19, 18...1) as seen on Mark's Daily Apple.
My mistake was not taking his advice to maybe start with descending sets from 10. I made it to 15 (20, 19, 18, 17, 16, 15) for a total of 105 in about 14 minutes and had to quit. Anyone who thinks that they need a gym to get in shape has obviously not ever tried Burpees. After the first 3 sets I was begging for a pain old LHT workout or even a sane version of HIIT.
Whatever doesn't kill you, right?