Push through your left foot to come back to standing. Recommended sets and reps: 3 sets of 10 to 12 reps on each side TRX curtsy lunges are worth your while. They help build muscular endurance and ...

Generally, you can modify most lunges by adding dumbbells, kettlebells, barbells or even the TRX. If you're looking for a high-impact variation to get your heart rate up fast, you can also try ...