Running

This sounds so good. Might have to give this a go

UPHILL TREADMILL POWER HOUR
There was a session I brainstormed and executed a few times which I thought was extremely effective. It's the Uphill Treadmill Power Hour:
Short warm up of 5/8 minutes.
Start the treadmill and get to max incline as fast as you can (usually 30 seconds). On the treadmill I used this would be 25% incline.
For the next 60 mins keep the treadmill on this incline, all you’ve got to do is keep moving uphill (reducing the pace if you need to).