From Tadasana bring your feet together. Bend your knees and lift your arms over head. Your sit bones should lower toward your heels to keep the length of your spine (rather than lift upward causing an arch in your lower back). Lengthen through the front and back of your neck evenly (mindful not to drop your chin toward your chest or stretch your chin forward). Keep your arms straight, drawing them back by your ears and feeling your shoulders blades release down and lift your chest.