I read it on the way, that 2 minutes rest between each sprint and 3 minutes rest between each set.
So, based on the book I made a calculation.
One set:
1. 10sec sprint uphill
2. 2 min rest, downhill
Repeat steps 1-2 10 times
After that 3min rest.
And now do 6-8 sets. Each set takes around 22-23 minutes, most of it is a resting.
Please correct me if I misunderstood it.
From other side the book authors should take it as a feedback how this excersise could be interpreted.