An-Aerobic Fitness for football training and exercises. Anaerobic exercise is exercise intense enough to trigger lactic acid accumulation. It is used by football trainers to promote strength, speed and power and the ability to develop tolerance to football matches requiring an-aerobic activities. Search has shown football (soccer) requires players to repeatedly produce maximal or near maximal sprints of short duration with brief recovery, which taxes the anaerobic endurance and create fatigue.