The United States Marine Corp. boot camp is world renowned if you are one of the highest demanding physical undertakings. This is something you want to ideally prepare for well in advance. A person will want to build towards the Marine Work out.
If you are out of form, or maybe overweight, you want to get started on out steadily and start easy. Even if you are reasonably fit, if you are not used to a hard training routine, being gradual is still key. Sure, in the Marines you will be pushed to breaking point and over and above. However, to build core fitness the more gradual you address your training routine, the better. Then you work up to a full Marine workout routine.
2 major areas you want to operate on are, cardio and building your core muscle strength. If you are fairly out of shape, you can start with a brisk walk for 30-45 minutes. Regarding muscle strength exercises like standard pushups, sit-ups and squats are great to begin (say 20 reps with 3 sets, or whatever feels more comfortable to start). If you are fitter you can step this up to a jog and more reps for your sets. Including a rest day between exercises is ideal. The major purpose here is to not make your workouts too hard and keep them steady.
You want to add short explodes intervals to your cardio exercise. Within the Marine Corp., you will be happening works three times a Train Like a Royal Marine 7 days for approximately three miles. A person will constantly be walking in line everywhere you go. Plus you will also be doing a lot of short sprints. So because of this, your cardio exercise has to be constantly aerobic (free breathing), with quick bursts of anaerobic (absence of) in your exercises.
Another core requirement in the Marines is your ability to swim. In case you don't know how, and/or not a very good swimmer, you need to fix this immediately. Get swimming lessons from a professional instructor and get as good as you can at swimming.
Be sure to contact your recruiter for more information, they can usually give you a guide for preparing for your Initial Strength Check (IST) and Physical Fitness Test) (PFT). This will provide you with much more tips, ideas, and so forth
Another exercise you can add to the conclusion of your exercises are part bridges. These are created by holding your whole body straight as an gazelle side on the ground side on, supported by your forearm only. Hold this position for 30-60 seconds both sides with 60 seconds rest between each.