From time to time throughout my "male" life, I've been an exercise freak of sorts. Eating once a day will actually cause your body to store fat. Eat small portions four to five times a day, cut back on carbs, but not too much. They provide your body with energy. Weight training can help, higher reps, light weight will help reduce weight with minimal muscle gain, help to keep you lean. Use light weights, maybe 3 to 5 pounds, high reps (about 15 to 20) when exercising your arms to get rid of the fat that flaps around under your arms. Eat healthy and lean, drink plenty of water. Doing the opposite of all this, heavy weights, lower reps, extra carbs, and protein supplements, will build muscle mass, which is what you want to avoid. Also, do some speed walking or jogging for at least 30 minutes to burn those carbs and trim down. About three times a week is good as a minimum.