### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi Im a 36 year old male and have experienced problems with physical activity for example yesterday I was gardening 1 - 3 hrs quiet vigoursly at this point I started to fell lightheaded and slightly weightless. I came in dooors and took my BP is was 176/91 with a pulse of 105.  After an hour it came down to 140/80 pulse of 69.  However this leaves me absolutely shattered I slept 12 hours got up and returned to bed after breakfast and a short walk in the sun for another 2 hrs.  This espisode has happen on serveral occassions.  I weight 300lbs and recently been 30mg of Citalopram (18mths) but have ceased during a controled period, My wife says that Im in a better place now.  However this is knocking my confidence I have recently returnd to my GP and after serveral blood tests says there is nothinh wrong.  Can you offer any advice.

### output:

Hi Their understand your concern for your health and I would like to tell that Increase in BP and Heart rate is a normal physiological process that should happen when we are physically active. As your blood tests came out to be normal the thing in your case I feel is that your body is not used to stressful physical activities that's why when once in a while you exert you feel completely shatter. Also, your body weight is on the higher side which make it more difficult for your body. Its advisable that you should start following healthy lifestyle habits like1. Going for daily morning walks for 45 mins a day for 5 days a week.2. Stop eating junk, canned and deep-fried food.3. Do not smoke (if you do)4. Include good amount of fruits and vegetables in your diet and avoid beer and other soft Chat Doctor. Follow this properly for 3 months and then maintain it you will surely feel fit. I wish you good health