Key points: Keeping the neck long and eyes down – a lot of people like to look ahead of themselves, but you want to keep the neck in line with the spine. The instructor also comments on where to feel the contraction in the back – this is important because many people are concerned about how high they can lift off the mat. This is not your main concern, otherwise your feet will lift and you will contract your glutes and lower back, which are not your main focus during this exercise.