ESD focuses on developing which capacities?

• A. emphasizing slow stretching
• B. developing anaerobic & aerobic capacities based on the demands of sport
• C. working only on agility drills
• D. improving only aerobic endurance

Answer: (B)

Energy system development is about building the body’s capacity across the different energy pathways to match what the sport demands. ESD aims to develop both anaerobic capacities (the short, high‑intensity efforts) and aerobic capacity (the longer, sustainable efforts) in amounts that reflect how a sport is actually played. That balanced focus lets an athlete perform repeated high‑intensity bouts and recover effectively, which is essential in most competitive activities.

This is why the best choice emphasizes developing both anaerobic and aerobic capacities based on sport demands. The other options miss this balance: slow stretching isn’t about energy systems; agility drills focus on neuromuscular skills rather than metabolic capacity; and improving only aerobic endurance neglects the necessary high‑intensity work many sports require.