Full body checkup. The get it done from?

I am a 27 year old male living in Delhi. Due the kind of job I have I often lead a very sedentary lifestyle. Though I play Badminton in the weekends for 2-3 hours. I have been smoking 6-7 cigarettes a day from last 8-9 years. From few months I feel exhausted sometimes as if I do not have any energy left in the body. This usually happens in the evening. Due to this I am planning to take a full body check up which should cover all the test including heart (ecg), lungs and other important parts which should be screened. I have gone through the tests available on the portal of srl diagnostic and dr lal pathology but they are quiet confusing. Can anyone guide me as in which test to go for which covers all the major body part tests and where to the get it done from ?