Body-for-LIFE Lower Body Workout

Today I did a modified lower body Body-for-LIFE style (I'll just refer to it as BFL) by doing 60 reps each of the following:

30 single leg lunges left (holding two 15lb dumbbells)
30 single leg lunges right (holding two 15lb dumbbells)
60 walking lunges (holding two 15lb dumbbells)30 Romanian deadlifts (holding two 30lb dumbbells)
60 slow calf raises
120 super quick "burner" calf raises
30 Romanian deadlifts (holding two 30lb dumbbells)
60 Ab pass with exercise ball (just watched that video, I'll have to work on better form next time!)

Didn't time myself with the stop watch, but looking at the clock it took me about 15 minutes.

That workout looks a little random and perhaps complicated.  It's my version of a BFL workout - For lower body you work these four muscle groups: Calves, Quads, Hamstrings, and Abdominals

The Body-for-LIFE exercise program for upper and lower body has you do 60 reps of an exercise like this

12 reps at a comfortable weight (like calf raises with just your body weight)
10 reps at a harder weight (calf raises holding 10 lbs)
8 reps at a harder weight again (calf raises holding 20 lbs)
6 reps at a very difficult weight (calf raises holding 30 lbs)
then lighten up the weight and do 12 reps (calf raises holding 20)
then immediately do 12 reps for calves in some other variation (calf raises with 20 lbs but toes pointed in)

so the reps are
12-10-8-6-12-12 = 60 reps

Sometimes I do it in the increasing intensity, other times I'll just pick a difficult weight and do 60 reps.