Continued from Ashlee Simpson’s diet.

While Ashlee Simpson’s diet is unremarkable, her workout is well structured and surprisingly useful, thanks to her trainer Mike Alexander, of course.

Ashlee has been training with Mike for a while (he’s best known for making Jessica Simpson look fabulously fit and healthy for her movie roles).

Ashlee usually works out at her home, where she has a treadmill, an elliptical, and dumbbells. She lifts weights to tone her arms and does lunges to keep her butt in good shape. Alexander also devises moves that do not require any tools but do utilize Ashlee’s surroundings.

“Her backyard has about 30 to 40 steps, so I have her jog down, do lunges for the length of the pool, jog back up the stairs, then I do a set of squats,” he explains. You can do the same workout anywhere you can find enough stairs. In fact, here is a typical Ashlee’s workout that you can easily do at home.

Ashlee Simpson’s workout The workout, for which you need some steps or a bench, a pair of 5- to 7-pound weights, and a jump rope, incorporates tri-sets, three back-to-back moves that work your upper and lower body. The nonstop pace helps you burn extra calories in less time.

0-5 min. Walk, gradually increasing to a jog to warm up.

5-10 min. Tri-set #1: biceps curls (20 reps), squats (25 reps), jumping jacks (45 seconds). Repeat tri-set once.

10-15 min. Tri-set #2: triceps extensions with bridge (20 reps), walking lunges (12 per leg), jump rope (45 seconds). Repeat tri-set once.

15-20 min. Tri-set #3: squats with shoulder raise (20 reps), step-ups onto a bench (20 reps per leg), high-knee jog in place (45 seconds). Repeat tri-set once.

20-25 min. Tri-set #4: reverse crunches (10 to 15 reps), calf raises (20 reps), plank pose (hold for 30 seconds). Repeat tri-set once.

25-30 min. Jog, slowly decreasing speed to a walk to cool down. [source: Shape]