The options are
1. Looking down toward the ground
2. keeping chin tucked toward chest
3. Moving hips side to side
4. Swinging both arms freely
You need to look forward, keep chin up and hips straight. So the correct answer is 4. Swinging both arms freely.
Keep your eyes forward, shoulders back, and head upright. Pull your belly button in toward your spine to engage your core muscles. If you find yourself slumping forward, take a moment to correct your body position. If you notice you're holding tension in your shoulders and neck, relax and release them.
An example of proper form when walking at a fast pace 4. Swinging both arms freely
Stand up straight, minimize leaning forward or backward, keep your chin parallel to the ground and eyes forward, relax your shoulders, and engage your core. Check in with your posture before and during your walks until good posture becomes a habit.
Many fitness experts consider a brisk walking pace to be 100 steps per minute or 3 to 3.5 miles per hour. A brisk pace is relative since it refers to your level of exertion, which depends on your fitness level.
To learn more about walking at a fast pace, refer
https://brainly.com/question/23852494
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