1. Your knees fall inwards. This can put pressure on the ligaments in the knee and lead to injury. Upping the strength of your inner and outer thighs will help – try llateral walks with a resistance band around your ankles.

2. Your lower back hurts. Adjust the distribution of your weight until you feel the tension in your legs and glutes instead of your back. If your lower back aches, brace your abs to keep it neutral.

3. Your heels rise. Keeping your heels planted firmly on the floor will help you push back up to the starting position effectively. If they come off the floor, it will knock your centre of gravity off-kilter and prevent you from recruiting your hamstrings and glutes properly.