This exercise provides all the benefits of a traditional lunge as well as all the benefits of a calf raise making it a really great exercise to challenge most of your lower body muscles with the added challenge of staying balanced.
For this exercise, start by getting yourself into the lunge position, ensuring your front knee is no further forwards than your toes. From here you should raise your front heel so that your front foot is on tip toes.
Whilst doing this, you should be thinking about sending the heel directly up into the air without letting the ankle bow out to the side.