Inspired by Anke who is sand dune running in harsh wind and sand storms in the dessert as I type this, we are going to try and spur her on by doing the same today!
Find yourself some hills - anything will do, don't aim for the South downs if you're a beginner though and don't opt out for a riverbank if you're a marathon runner! As a guide, the hill has to be mildly challenging for you to walk up. Aim for a minimum of 20 meters.
Now 15 minutes brisk walk, jog to warm yourself up, loosen up your hamstrings with a nice hamstring stretch - (toe touching will do) - and off we go.
Facing at a diagonal to the hill, jog up and immediately sprint down. - Repeat this 5 times.
1 minute rest and repeat for 5 sets
That's 25 sprints in total.