Quote Originally Posted by GutShot
you ahvent trained in a while, its a shock to your body. Your body has become less effecient and "fit" with your time out of the gym so its no big suprise when you can barely handle a workout.

i nearly threw up 3 times on my first night at boxing, its one reason i dont want to quit for a long period of time

things will get easier, just drink water throughout the day (min of 2 litres, 3 ideal), eat well and get at least 8 hours of sleep a day. if you can do this then all you will have to focus on is your training

(very very generalised i know but ask questions if you have any about diet,rest and anything else)

Big dog have your heart checked out. Passing out from strenuous activity is a sign for serious heart conditions such as dangerous murmurs.
If you passed out you should definately see a doctor and explaing to him what happened. If you check that you have passed out doing strenuous activity, you will have a difficult time getting a boxing license, this includes an amateur license. Be careful, something similar but not as bad happended to me that's how I found out I have a murmur. Make sure to tell the person setting your appointment what caused you to pass out and what your intensity was at the time so they will know what type of test to give you.

good luck