Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to stretch your abs [title] Do a standing ab stretch. [step] Stand tall with your feet hip width apart. Reach your arms above your head as far out as you can.

Ending1: Slowly lift one leg so it is stretched, then hold on to the foot with your bottom hand. Lower the leg slowly until your toe is pressed against the floor. Ending2: Sit down on the mat and roll your abs back and forth as much as you can. Hold the stretch for 5 seconds and then slowly come back down on the mat. Ending3: Then : [substeps] Raise your shoulder blades up, so your shoulder blades leave a corner of your chest open. Drop your arms slowly toward your chest, spreading your arms out as far as you can. Ending4: Lean back and arch your spine to open your abs and chest. Hold the stretch for 20 to 30 seconds, then repeat 2 to 4 more times.

Answer format: ending1/ending2/ending3/ending4