HETFIELD consists of 2 parts that you should complete one after another.
In part a) you complete 5 sets of 5 back squats. Choose a weight that allows you to perform the with good form. It should be heavy but doable.
The second part combines SkiErg, Air Squats and Burpees. In the first round, you’ll complete 30 calories SkiErg, Air Squats and Burpees, in the second rounds it’s 20 cal/reps, in the third round 10 cal/reps, then 20, then 30. The time cap for part b) is 30 minutes.
Scaling: You can scale HETFIELD by choosing a light to moderate weight for part a) and by skipping every other round in part b) (=30-10-30)