This total body exercise activates your core muscles while gently beginning to wake up and work your muscles.
To do it: Begin in an all-fours position, back straight, abs pulled in tight [as shown in photo A]. Slowly extend your right arm in front of your shoulder, palm facing down, as you simultaneously extend your left leg behind your hip [as shown in photo B]. Hold for one count and then return to start. Repeat 10 times in total, alternating sides each time.
Form Tip: Keep your torso as still as possible during this exercise – imagine you are trying to balance a saucer of tea on your lower back the entire time.