Sister Rosamaria Con Suelo del Sassy, otherwise known as Rosemary Sarka, doing a modified knees to elbows.
Workout:
100 Squats
Back Extensions: 50-40-30-20-10
Knees to Elbows: 25-20-15-10-5
100 Squats
Alternate the Back Extensions and Knees to Elbows.