The overall objective of this book was to develop, evaluate and compare hypothetically deducted anaerobic training methods for the purpose of improving the anaerobic physical components in soccer players. To achieve this overall objective, three sub objectives were developed. First: assuring the reproducibility of the measuring systems used in data collection. Second: implementing, evaluating and comparing the effects of anaerobic training programs designed. Third: to better understand the effect of the implemented anaerobic training programs; a follow-up study that investigates the relationship between measures of aerobic and anaerobic variables was conducted.