20,16,12,8 repeats (each leg)
Stand with your feet shoulder width apart. Hold the kettlebell with both hands in front of your chest.
Brace your core and then step into a lunge with your right leg. Go down onto the back knee and ensure both knees finish close to 90 degrees. Hold for a few seconds.
Raise your body back up to the starting position so your feet come together again.
Repeat the lunge with your left leg. Repeat the exercise according to the training plan alternating legs.