PE fitness lessons are physical education lessons that focus on improving fitness levels and promoting a healthy lifestyle. These lessons typically include a variety of exercises and activities that target different aspects of fitness, such as cardiovascular endurance, muscular strength and endurance, flexibility, and body composition.

Some common activities that may be included in PE fitness lessons are:

1. Warm-up exercises: These exercises are performed at the beginning of the lesson to prepare the body for physical activity. They typically include dynamic stretches and light cardio exercises like jogging or jumping jacks.

2. Cardiovascular exercises: These exercises aim to improve cardiovascular endurance and can include activities like running, cycling, jumping rope, or participating in aerobic dance routines.

3. Strength training exercises: These exercises focus on building muscular strength and endurance. They may include bodyweight exercises like push-ups, squats, lunges, or using resistance bands or weights.

4. Flexibility exercises: These exercises aim to improve flexibility and range of motion. They can include static stretches or dynamic stretches like leg swings or arm circles.

5. Circuit training: This involves performing a series of exercises in a circuit format, moving from one exercise to the next with minimal rest. It helps improve overall fitness and can include a combination of cardiovascular, strength, and flexibility exercises.

6. Team sports or games: PE fitness lessons may also incorporate team sports or games like basketball, soccer, or volleyball, which provide a fun and engaging way to improve fitness levels.

The specific activities and exercises included in PE fitness lessons may vary depending on the age and fitness levels of the students, as well as the resources and facilities available. The goal is to provide a well-rounded fitness program that promotes physical activity, improves fitness levels, and encourages lifelong healthy habits.