With this exercise, we will work our abdominal muscles. Probably one of the most hated but effective exercise. It needs no introduction because you can have second thoughts so, let´s go for it:
Lie on your back and lift your legs straight up into the air. Extend your arms. This will make your body form an “L”. Inhale and make sure you keep your lower back pressed flat on the ground.
Exhale and crunch, touching your toes with your fingers.