Give each round everything you’ve got. This is meant to be mentally challenging, like yesterday’s back squats, but in a TOTALLY different way. This one is cardio + will power. For those who cannot jump and pull-up their chin over the bar from the ground, use a box to step up on after your burpee and do a jumping pull-up from atop the box. Scale the run to a 400m run if your time trial 600m is longer than 3:30. Push the pace. All 4 rounds. Let your effort on these intervals make you fitter.

4 Rounds EACH For Time:
12 Burpee Pull-ups
600m Run
Rest as needed between sets
post all 4 finish times and any scaling