One of my favourite run sessions for the athletes I coach (they might not agree 😂) Do these on road, grass or good trail, on a runnable gradient. Each effort should be run hard and at the end of each rep, the goal is to be in oxygen debt – i.e. you should be breathing hard. Recovery will be 2 mins for the 60s reps and 90s for the 30s reps. This type of hill training will prepare you for fast running in future with a reduced risk of injury. You will also work lots of muscle groups hard so is goo