20 reps. 20 seconds rest. Repeat until you hit 100.

Stay in position during the short rest periods instead of resetting between sets. This keeps the glutes working and turns a simple movement into a serious 100-rep challenge.

This workout is FREE and is also part of my upcoming 100 REPS Challenge: 5 exercises. 100 reps. 5 days a week.

One exercise today. A complete training system is coming.