Another way to get some conditioning in with the Prowler on a short straight away is with Prowler shuttle runs. Sprint 10-15 yards using the high handles and then immediately sprint back using the low handles. Do this maybe 2-3 times as a set, rest for about 60 seconds and then repeat for the prescribed number of sets.
Or if you want to go a little “out of the box” you could use Prowler shuttle runs as a power exercise on a lower body day. If using it as a power exercise only make one down and back trip as a set. Rest for about 60 seconds and repeat for 4-6 sets.