Soccer players require endurance, strength, power, agility and sport-specific skills. A year-long training program should be segmented into early pre-season, late pre-season, competitive season, and off-season phases with different emphases in each. The document then provides sample 4-week training plans for each phase of the year-long program with a focus on developing aerobic capacity, strength, speed, and skills through exercises like squats, lunges, sprints and soccer drills.