A small amount of blood is taken from a vein in your arm with a needle. The blood is collected in tubes and sent to a lab. Ask your healthcare provider when and how you will get the result of your test. Some of the reasons your CK level may be higher than normal are: You have had a heart attack in the past 72 hours.
A deep end or deep center in an above ground pool is simply an area dug out in the earth to add up to an additional 2 feet of water depth to an above ground pool. A deep end or middle can be of varying depths or size depending on your preference. But not all above ground pools are candidates for this upgrade.
I never dive I used to do it in sea waves and even there once I bumped my head at the bottom a few times. For a shallow racing-type dive, a zero-freeboard pool should be at least 4 ft deep (and 6 ft would be better). So if you want to be able to dive in from any point along any edge of the pool, it would need to be 4-6 ft deep over its entire 'footprint'. For a vertical entry, significantly more depth is needed to reduce the risk of serious head/neck injury.