Alright, So I know lots of people who cosplay want to get in better shape and just don't know where to start!
So I have actually put together a plan that works really well. (I'm doing it myself.)
If you can, every other day, go to the gym and do 30 minutes cardio (Aka, get your heart pumping with the elliptical, tredmill, stair climb, ect.)
Then, for another 30 minutes, do weights. Don't do heavy weights, but lighter weights. Make it a work out but don't strain yourself. (You can do more time if you like but for beginners, an hour is good.)
If you can't go to a gym, go on a speed walk or for a run around the neighborhood or at your local track.
So do that every other day! Giving a day in between helps your muscles build back up and gives your body time to get itself ready for your next work out.
(Something to keep in mind, is after burn can last up to 48 hours. So, after your work out, your body is still burning fat and calories)
Now every single day, Before bed or whenever you want, do sit-ups. You can start out with doing 50 a night, then go up to 100, then to 150, 200, 250, ect.
You can do it on the floor or on your bed, whichever is less painful for your back. (If you have back problems make sure to do it on a soft surface)
So there you go!
If you want to go the extra mile, always eat a balanced breakfast, and through out the day, have small healthy snacks. Stay away from fast food and junk food 6 days a week, then give yourself one day where you can eat whatever you like to reward yourself for getting so far!!
So that means no chips, chocolates, soda, McD, BK, greasy foods.
It has been working wonderfully for me. Though my goal is to just tone my muscles.
Keeping this up for three for four months is ideal, but if you want to maintain your look and weight, keep at it and continue the routine.
Good luck!!
