If you are getting ready to move from infantry to special ops training, you may start doing this program from a former Navy Seal and Certified Strength and Conditioning Specialist (CSCS). To improve your mobility and flexibility, Stew recommends making every workout day a mini-mobility day at the end of the day or workout period. He also adds to start by adding swimming workouts, PT reset exercises, and the water mobility and dynamic stretches.
Source: https://www.military.com/military-fitness/ask-stew-getting-ready-move-infantry-special-ops