You must pass a physical exam to qualify for entrance.
Otherwise, your pay grade and rate/rank may be modified based on Navy Reserve needs in specific ratings. Refer to the Rate/Rank Converter to see your equivalent rate/rank in the Navy Reserve.
The best way to confirm the specific service commitment that is best for you is to contact a recruiter.
If you're a former Navy servicemember (NAVET), be aware that you can receive guaranteed initial deployment deferment when you affiliate with the Navy Reserve.
Serving in the Navy Reserve traditionally requires a minimum of one weekend a month (drilling) and two weeks a year (Annual Training).
Most of the training can be arranged to take place close to home so you won't need to relocate. that offer flexible drilling options so you could fulfill your annual commitment in a single extended mission or serving on weekdays if your civilian career makes weekend service difficult. This is typically a command exercise with your drilling Reserve detachment, but you may also have opportunities to pursue independent assignments that broaden your experience.