Provide criteria for correctly performing flexibility exercises.

1. Warm up properly: Before attempting any flexibility exercises, it is important to warm up your body to increase blood circulation and raise your core body temperature. This can be done through light cardio exercises like jogging or jumping jacks.

2. Proper technique: It is crucial to perform flexibility exercises with the correct technique to avoid injury and maximize the benefits. Use proper form and posture, and listen to your body's limitations. Avoid bouncing or jerking movements, as they can strain the muscles.

3. Gradual progression: Flexibility exercises should be gradually progressed over time to avoid overstretching or injuring the muscles. Start with low-intensity stretches and gradually increase the intensity and duration as your flexibility improves.

4. Consistency: Flexibility exercises should be performed regularly to see improvements. Aim for at least three to five sessions per week.

5. Controlled breathing: Proper breathing technique can enhance flexibility exercises. Deep, slow breaths should be taken throughout the stretches to promote relaxation and focused movement.

6. Balance: Flexibility exercises should target all major muscle groups and opposing muscle groups equally to maintain balance in the body. Neglecting certain muscle groups can lead to muscle imbalances and potential injuries.

7. Pain-free stretching: While you may feel mild discomfort during stretching, flexibility exercises should not cause sharp or intense pain. If you experience pain, immediately stop the exercise and consult a healthcare professional.

8. Progress monitoring: Keep track of your progress by measuring and recording your flexibility levels over time. This will help you set realistic goals and motivate you to continue with your flexibility training.

9. Stretch both sides of the body: It is important to stretch both the right and left sides of the body equally to maintain symmetry and prevent muscle imbalances.

10. Stretch in a safe environment: Ensure that the area where you are performing flexibility exercises is free from obstacles or hazards that could cause accidents or injuries.

Correctly performing flexibility exercises requires the following criteria:

1. Warm-up: Begin by warming up your body with light cardiovascular exercises, such as brisk walking or jogging, for at least 5-10 minutes. This increases blood flow to the muscles and prepares them for stretching.

2. Proper form: Maintain correct body alignment and posture during each stretch. Avoid jerky movements or bouncing, as this can increase the risk of injury. Instead, move slowly and steadily into each stretch, feeling a gentle pull on the muscles.

3. Pain-free range of motion: Stretch only to the point of mild tension or discomfort, not pain. Overstretching can cause muscle strains or tears. Listen to your body and never push yourself beyond your limits.

4. Gradual progression: Start with easier stretches and gradually increase the intensity or duration over time. This allows your body to adapt and improves flexibility gradually, reducing the risk of injury.

5. Balance between flexibility and strength: Flexibility exercises should be complemented with strength training to maintain balance in the muscles and joints. Strength training helps stabilize and support the joints during stretching movements.

6. Proper breathing: Breathe deeply and continuously throughout each stretch. Avoid holding your breath, as it can increase tension in the muscles.

7. Consistency and frequency: Aim to perform flexibility exercises at least 2-3 times per week. Consistency is key for improving and maintaining flexibility. However, avoid stretching the same muscles on consecutive days to allow for adequate recovery.

8. Stretching all major muscle groups: Include stretches for all major muscle groups, such as hamstrings, quadriceps, calves, chest, back, shoulders, and neck. This ensures an overall improvement in flexibility and reduces muscle imbalances.

Remember to consult with a healthcare professional or a certified fitness trainer before starting any new exercise program, especially if you have any pre-existing medical conditions or injuries. They can provide personalized advice and modifications based on your specific needs.