Here is a 40 minute treadmill workout that I did as part of my cardio day. This would be great for beginners to intermediate level exercisers.
Here’s a sample of the first 16 minutes. You increase the incline by 1% every 2 minutes until you reach 9.0 then begin to decrease at the 20 minute mark. This should be done at a speed of 3.4-3.8. Depending on how you feel. Don’t be afraid to push yourself. HERE’S THE CHALLENGE: DO NOT HOLD ON! You must push through with the glutes and legs and use your arms to get through the higher inclines. You can do it!