Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do and recover from a backbend [title] Warm up your back by doing seal stretches. [step] This will help for when you get into your arch position. [title] Stretch your hamstrings by doing middles splits while keeping your elbows on the ground.

Ending1: [title] Perform spinal stretches that emphasize your neck and shoulders. [title] Try planks to lower your self into valley position. Ending2: [title] If you feel your muscles begin to lose tension and you start to arch, time out this stretch and repeat it two more times. [title] If you feel your ab muscles begin to lose tension and then begin to arch, time out this stretch and repeat it two more times. Ending3: [title] Stretch your shoulders by having a person stand behind you. [step] Reach your arms out behind you and have your helper grab them and gently pulling them back. Ending4: [title] Try warm up your arms before you do pull ups. [title] Loosen and loosen your glutes to take away pressure on your back.

Answer format: ending1/ending2/ending3/ending4