Start on your back on a yoga mat holding a dumbbell in each hand. Bend your knees and place your feet flat on the mat, ensuring that they are hip-width apart and that your spine is in a neutral position.
Extend your arms and hold the dumbbells directly in front of your chest in a neutral grip (palms facing inwards), keeping a slight bend in your elbows. Draw your shoulder blades down and back.
Inhale to lower the dumbbells outwards towards the mat, stopping when they reach chest height.
Exhale to squeeze the muscles in your chest and lift the dumbbells back up to the starting position. Repeat for 30 seconds.