RE: ymca scuba?
i am a navy 1st class diver , i find it hard to believe Y M C A cert is as physical as military . if you need to brush up on somethin try swiming on your back with a set of fins ons as many laps as your legs can stand,after you get use to that say 500 yard easily. put some wieght on a wieght belt increase it gradually. after swimming on your back , try an tread water as long as you can. this will help you build up your stamina. you need to be able to tread water an swim on your back so you can get back to your dive boat. these exercises will also increase you lung capacity an being in decent physical shape . will help your body off gas the nitrogen your body abbsorbes while diving . hope this helps do give up so easy its really a fun sport omce you get comfortable with it
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