Sit Up Start by lying on your back with your arms across your chest.Flex knees at a 45° angle.Arms crossed touching clavicles.Waist flexion.Abdominals contracted. • Elbows touching the upper thighs.Head in a neutral position. Read more articles Previous PostShoulder Bridge Next PostSquat You Might Also Like Squat November 8, 2019 At-Home Upper Body Workout | 3/31/20 March 31, 2020 Plank November 8, 2019