Cardio intervals during strength class

Today we started class with about 15 minutes of typical strength work with lunges, curls, presses, arm extensions, squats, pushups with rows, etc. Then we did some high high rate efforts of 5, 4 and 3 minutes with 1-2 minutes between. the 5 minute went something like this: 1 minute running off the back of the step 30 seconds ski jumps 30 second butt kicker running 30 seconds high knee kicks one minute mountain climber 30 seconds ski jumps one minute running in place with 10 second sprints in place, 10 seconds running in place, repeated The other efforts followed the same pattern but mixed in power jumps, knee slap jumps, speed skaters, squat thrusts, side to side squat thrusts, etc. Then it was back to strength until we wrapped up class with more cardio.