Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to get toned and fit (for girls ) [title] Stretch. [step] Stretching will help you loosen muscles and prevent injuries. Make sure to stretch major muscles such as arms, legs, neck, sides, and abs.

Ending1: Don't leave the elbows stiff and tense your neck muscles up! [title] Do a shoulder stretch. [step] This stretches your shoulder area, paying attention to your muscle growth. Ending2: [title] Do a 5-10 minute warm-up. [step] Do jumping-jacks, take a short jog, a brisk walk, climb stairs, etc. Ending3: This will help prevent tendromes from forming. You want to stretch your muscles so they can move properly and will help to prevent tendons from growing. Ending4: [substeps] For body parts like buttocks and tummy, sit on a chair or a coffee table. Hold your shoulders back and arch your back so your back touches the chair/table.

Answer format: ending1/ending2/ending3/ending4