So I am 16 years old, great grades no criminal record and my asvab score is good enough to do nuclear propulsion. However, back until I was 6 years of age I wanted to be a NAVY SEAL. Essentially it is just an insane amount of endurance needed (100's of pushups a day 5 days a week long runs and 5 mile ocean swims etc) I was doing good in fitness but I hit a rut where I lack energy for alot of exercise. Any tips?