A slightly different style of challenge for you this morning.  See the introduction video below.

If you are happy to time yourself or use a kitchen time, that is fine.  If you would like some help, the video below (which has no picture) will guide you through a short stamina session.  (Please note, the time intervals on the recording are not exact.)

You may replay the video if you wish to work for a little longer or continue with jogging or jumping, rather than walking.