Besides the larger issues of whether or not this is something you should be doing, this seems a decent overview. Except for one part, the amount of exercise is

Besides the larger issues of whether or not this is something you should be doing, this seems a decent overview. Except for one part, the amount of exercise is terribly low. A swim a couple times a week and 30 minute walks every day is not good enough for your health or if you are chasing peak performance. First of all, this isn't even enough to offset the damage this much inactivity will cause. If you want peak mental performance and endurance then you want to be very active and very fit. Doesn't really matter what it is, although it should favour cardio over muscle mass at least a little.