For Time: 40/30/20 reps of burpee, walking lunge @ 20/15kg Workout

For time:
40 x Burpee
40 x Walking Lunge @ 20/15kg
30 x Burpee
30 x Walking Lunge @ 20/15kg
20 x Burpee
20 x Walking Lunge @ 20/15kg

Record time, scaling and other thoughts.