Decide which of the following physical activities incorporates stretching on a regular basis?

1. Yoga: Yoga is a physical activity that incorporates stretching throughout the practice. Various poses, such as downward dog, warrior, and child's pose, involve stretching muscles and increasing flexibility.

2. Pilates: Pilates is a form of exercise that emphasizes core strength, flexibility, and body awareness. It often includes stretching exercises, like the cat-cow stretch and the hamstring stretch, to improve flexibility and range of motion.

3. Dance: Many dance styles, such as ballet, contemporary, and jazz, require extensive stretching to improve flexibility and perform movements effectively. Dancers regularly engage in stretching routines to increase their range of motion and prevent injuries.

4. Tai Chi: Tai Chi is a martial art that combines slow, gentle movements with deep breathing and mental focus. It incorporates stretching and balance exercises, promoting flexibility, joint mobility, and relaxation.

5. Gymnastics: Gymnastics involves various stretching exercises to enhance flexibility, as flexibility is crucial for executing advanced movements and preventing injuries. Gymnasts regularly perform stretches targeting different muscle groups.

6. Martial arts: Different martial arts disciplines, such as karate, taekwondo, and judo, incorporate stretching as a part of their training. Flexibility is key to performing kicks, blocks, and throws with proper technique and avoiding muscular injuries.

7. Barre workouts: Barre workouts, inspired by ballet training, focus on sculpting and toning the body while also incorporating stretching exercises. Many barre exercises involve stretching and lengthening muscles to improve flexibility.

8. Figure skating: Figure skaters often integrate stretching routines into their training sessions. Stretching exercises are essential to maintain and improve the flexibility required for performing jumps, spins, and complex skating moves.

All of the activities mentioned above incorporate stretching on a regular basis.

To decide which of the following physical activities incorporates stretching on a regular basis, we need to consider each activity and its emphasis on stretching:

1. Yoga: Yoga is a physical activity that focuses on stretching and flexibility through a series of postures and movements. It incorporates various stretching techniques, such as static stretching, dynamic stretching, and deep stretching.

2. Pilates: Pilates is a form of exercise that emphasizes core strength, flexibility, and body alignment. It incorporates stretching through controlled movements and positions, targeting specific muscle groups to improve flexibility and mobility.

3. Dancing: Dancing can vary in terms of stretching depending on the specific style or routine. Some dance styles, such as ballet and contemporary, often include stretching as a warm-up and as part of the training regimen. However, other dance styles may not incorporate as much stretching on a regular basis.

4. Weightlifting: Weightlifting primarily focuses on building strength and muscle mass rather than stretching. While some weightlifters may incorporate stretching into their routine, it is not a central aspect of this activity.

Based on these considerations, the physical activity that incorporates stretching on a regular basis is Yoga.