I didn't have a lot of time so I just did a challenge session from the tactical barbell 2 book. It's called the praetorian hills workout I guess it's like a South African special forces workout.
I took a 24kg kettlebell to my hill where I do sprints (~ 30m but steep enough).
The workout goes like this:
-10 swings -"sprint" the hill....carrying the kettlebell to the top..... -10 goblet squats with the kettlebell
Then walk down the hill x 10..
For the last few sets I wasn't running much at all.
