4 x 5 HIIT.
i came up with the name for this workout because it is four sets of 5 minute intervals. the speed increases each minute for a total of five minutes, then you repeat this process three more times. the incline gets a bit steeper with each interval.
remember, you can always lower or increase the speeds to fit your ability. to make it more challenging, increase your incline percentage by a whole % each time instead of just 0.5%
|minute #||speed (MPH)||incline (%)|
this workout should carry you about 2.3 miles total. make sure you warm up and cool down before and after the 20 minute. i like to warm up for 2 minutes and cool down for 5 minutes.
let me know if you try it!