The rubric below will be used to assess the physical education task.

Step 1: Importance of warm-up activities A proper warm-up is crucial before any aerobic exercise as it gradually increases heart rate and blood flow to muscles, reducing the risk of injury such as muscle strains or pulls. It enhances oxygen delivery to working muscles, improves joint mobility through dynamic movements, mentally prepares the participant, and optimizes performance by activating the neuromuscular system. Without it, sudden intense activity can cause dizziness, cramps, or cardiovascular stress. Step 2: Detailed warm-up program (5-10 minutes) Marching or light jogging in place: 2 minutes to elevate heart rate. Arm circles (forward and backward): 30 seconds each direction. Leg swings (front to back and side to side): 10 reps per leg. Torso twists: 1 minute. Dynamic lunges: 10 per side. This program is well-planned to target major muscle groups, increase body temperature, and prepare for aerobic work without fatigue. Step 3: Importance of cool-down activities Cool-down activities safely return heart rate and blood pressure to resting levels, preventing blood pooling in extremities which could lead to dizziness or fainting. They aid in removing metabolic waste like lactic acid, promote muscle recovery, improve flexibility via static stretching, and reduce delayed onset muscle soreness (DOMS). Consistent cool-downs enhance overall fitness adaptation. Step 4: Detailed cool-down program (5-10 minutes) Slow walking: 2-3 minutes to lower heart rate. Static hamstring stretch: hold 20-30 seconds per leg. Quad stretch: 20-30 seconds per leg. Chest opener stretch: 30 seconds. Child's pose for back: 30 seconds. This ensures comprehensive recovery, focusing on flexibility and relaxation. Step 5: Aerobic exercise program design Purpose: This program is designed to improve cardiovascular endurance, increase aerobic capacity (VO_2 max), burn calories for weight management, and enhance overall stamina for daily activities or sports. It follows the FITT principle for safe progression, suitable for a healthy adolescent aiming for 3-5 sessions per week. FITT Specifications: Frequency: 4 days per week (e.g., Mon, Wed, Fri, Sat). Intensity: 60-80\% of maximum heart rate (calculate as 220 - age; target 120-160 bpm for 15-year-old). Time: 20-40 minutes continuous. Type: Continuous moderate aerobic activities. Sample 30-minute session: 1. Warm-up (as above): 5-10 min. 2. Main activity - Brisk jogging or cycling: 20 min at steady pace (talk test: can speak but not sing). 3. Cool-down (as above): 5-10 min. Progression: Week 1-2: 20 min; Week 3-4: add 5 min and slight intensity increase. Monitor with perceived exertion (RPE 5-7/10). This program is excellently planned with clear purpose, progressive structure, and safety considerations. Complete Aerobic Fitness Program (Total: Excellent - 10/10 marks Warm-up (5-10 min): March/jog, arm circles, leg swings, twists, lunges. Main (20-40 min): Jog/cycle @ 60-80\% HRmax, 4x/week. Cool-down (5-10 min): Walk, hamstring/quad/chest/back stretches. Purpose: Improve CV endurance \& stamina via FITT.