10 rounds, each for time, of:
100-meter sprint
Rest 90 seconds
Post times for each round to comments.
Scaling:
The rest between rounds should allow you to feel recovered for the next effort. Increase the rest time if needed. Intermediate athletes can do this workout as prescribed. Commit to a thorough warm-up and gradually increase the speed of your running before attempting an all out sprint.
Beginner Option:
6 rounds, each for time, of:
100-meter run
Rest 2 minutes