Warm up on the treadmill for 5 minutes then increase your speed and run hard for 3 minutes. Drop your speed and increase the incline to 10% and run for 2 minutes.
Hold one dumbbell up in your RIGHT hand, so it's overhead with a straight arm. Lunge forward and back with the RIGHT leg. Repeat 10X on each side for 4 sets.
Run fast for 3 minutes, decrease your speed and increase your incline to 8% and run for 2 minutes.
On the

Run fast for 3 minutes, slow down, increase incline to 6% and run for 2 minutes.
Perform decline push ups (feet on a bench or a couple of stacked plates, depends on how easily you do push ups). 4 sets of 20 reps.

Jog easily on the treadmill for 5 minutes.
And yes, stretch. Again I know it is highly unlikely that you will stretch on your own but please, stretch at least your low back, hamstrings and chest (see illustrations below).
Hamstring Stretch