Before you start preparing to lose weight, you have to take into account of your fitness levels. If you are obese then first things you need to do is clean up your diets and start spending more time on activities.
1. Starting Diet :
I have personally tested many diets. Atkins, south beach etc but one thing is for sure, if you use a simple low carb approach you'll lose fat. But I don't recommend low carb like other trainers because if you spend too much time with this diet, you'll hamper your metabolism.
2. 4 week Workout routines
Do you really think same old workout will work?
Obese people need to get stronger & use resistance training to build muscle so they can do cardio type events. Building muscles will boost your metabolism and help you burn more fat. Here's more realistic plan :
Week 1 : 40 minutes of fast walking every day
Week 2 : 40 Minutes of Fast walking for 4 days
2 Day bodyweight workout : Lunges, Squat, push up (do as many reps/sets you can)
Week 3 : 40 minutes of Walking for 3 days
2 Day bodyweight workout : lunges, squat, push-ups, step up (on 15 inch platform). Do as many as you can.1 Day sprint training (or 1 day beach training) : You'll start running (or sprinting) 100 m as many times as you want. If you don't have beach, you can try Hill running.
Week 4 : 40 minutes of walk X 3 days
3 day sprint training on beach/hill : 100 m sprints as many as you want.
This is not a complicated program at all. But this will help you get back in exercise shape in 4 weeks before we can really go for some of my power programs.
This is very moderated workout for you for next 4 weeks, I'll add more weeks if you want. Or additionally you can just email me for more ideas.