Loyd Lewis gets a little assist performing the "hollowback" (bent arm - straight hip - straight leg) press to a handstand. This is the fourth in our series of five presses to handstand and with the "stiff-stiff" is the second press of merit. This press is easily spotted with a gentle lift of the feet towards the handstand.
From American Gymnast here's a midsection conditioning drill. Midsection workouts are perfect warm-up elements.