Chinups exercise the back muscles with some assistance from the biceps. Chinups can be done with an underhand grip (see photos) – this involves more biceps, or with an overhand grip which involves more back.
1. Keep shoulders blades squeezed back throughout the entire exercise (imagine you have a raw egg inbetween your shoulder blades and you don’t want to let go). Pull in your abs just below your belly button, and tilt the upper body slightly backwards (ie stick your chest out).
2. Breathe in and as you exhale, (remembering to keep your shoulder blades squeezed back and lower abs pulled in), lift yourself upwards, aiming to reach the upper bar with your chest and to get your head above the bar (refer picture ‘3’.)
3. Don’t forget to breathe!