Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to teach yourself gymnastics [title] Make sure you're physically prepared. [step] Before you start flipping, pirouetting and standing on your head, you should work to reach a base level of physical conditioning. Build your muscular strength by performing calisthenics exercises such as push ups, pull ups, air squats and crunches.

Ending1: [substeps] Incorporate strength training into the class to build your strength in a safe, stable, controlled way, the first step to becoming stronger is correctly completing a handstand. [title] Provide support in straddle splits. Ending2: [title] Familiarize yourself with stage-jumping and performing everyday gymnastics moves. [step] While jumping can be a fun part of gymnastics, even novice gymnasts often find that their body needs some extra support. Ending3: Go for a jog or swim laps a couple times a week to get in better cardiovascular shape. Begin stretching thoroughly every day-flexibility plays a critical role in gymnastics. Ending4: Weigh yourself once a week to determine your ideal level of physical exercise. [title] Pick the right stance for performing your gymnastics move.

Answer format: ending1/ending2/ending3/ending4