Book excerpt: Practical applications of physiology of exercise factual materials found in the Applied Physiology of Exercise textbook are of paramount importance to understand the principles of training. The Applied Physiology of Exercise Laboratory Manual complements the Applied Physiology of Exercise textbook where practical applications in both laboratory and field settings are shared. These practical applications are mostly through personal research at the Nanyang Technological University, National Institute of Education, and Human Bioenergetics Laboratory of Singapore. The uniqueness of the laboratory sessions found in the manual was attested to the many hours of hard laboratory research work. For example, the Running Energy Research Index (RERI) Laboratory was born as a result of a 10-year long research. This laboratory research work, like the other researched laboratory sessions in the manual, is then used in practical sessions in physiology of exercise classes to fine-tune the best possible learning experiences for students. After a long process of fine tuning and constructive feasibility, the laboratory sessions became concrete and designed specifically for this manual.