Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to exercise and lose weight by turning everyday household chores into an exercise routine [title] Pick up items on the floor or tables by squatting. [step] Keeping your back straight, squat deeply by bending your knees. Hold for 15 seconds before rising up again.

Ending1: Then stand up, lean forward on your heels and return to squatting position. [substeps] Don't sit on the floor, chair, or even table; only squat until you feel your muscles stretching. Ending2: [substeps] Make sure to keep your back straight as you squat. Make sure you stay bent, as squatting can lead to spine issues. Ending3: [substeps] Repeat with each item of clothing, toy or other item. If you are unable to hold for 15 seconds, start with 5 seconds and increase as your hamstrings and quadriceps grow larger. Ending4: After 15 reps from the squatting position, raise your torso into a sit position. [title] Place a small bag on the floor next to your shoulders.

Answer format: ending1/ending2/ending3/ending4