Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do a back limber [title] Perfect your handstand. [step] The handstand is a basic gymnastic move that you'll need to be fully capable of doing in order to execute a back limber. If your handstand is a little rusty, practice until you can do it easily without the help of a spotter.

Ending1: [substeps] Sit on the floor with your back straight, with your feet shoulder width apart. Be sure that you're still upright, with your back straight. Ending2: [substeps] Practice using good form-keep your shoulders in and your legs together. Be confident that you can hold your handstand for several seconds. Ending3: [substeps] You'll need to be properly trained in yoga to perform the handstand. Vascular strength and stability will help strengthen your back and prepare you for the sit-ups and pulling-ups that will commonly be required with core and upper body strength training. Ending4: Just because you're good with your hands doesn't mean you can't master the handstand. There's no need to beat anybody just to learn the handstand.

Answer format: ending1/ending2/ending3/ending4