Unfortunately for many soldiers, running, pushups, and sit-ups address endurance, but do little to train mobility and strength. To meet the demands of their work and help avoid overuse injuries, a training program for soldiers should include mobility, strength, and endurance components.
This book excerpt from Developing Endurance goes over nutritional strategies for pre-competition and during competition phases to maximize performance.
Opinions about the best functional exercises will always differ; however, science, logic, and a systematic approach will reduce confusion and debate. In this session from the 2014 NSCA Personal Trainers Conference, Gray Cook presents an interactive discussion that will provide you with the tools to elevate your skills with exercise choice and program design.
Exercises performed in the water that improve swimming skills and simultaneously work the core can be beneficial for swimmers. One particularly useful core exercise that is specifically designed for swimmers is a kickboard progression, such as the one described in this article.