My husband used to be a lifeguard.  He had to be a strong swimmer, trained in CPR and first aid and certified in water rescue.  Have you ever needed a lifeguard/
I have not. I am a decent swimmer.
I feel much safer when there is one around!  I like that they supervise the safety of the swimmers, surfers and other water sports in pools, on a beach, etc.
That is a good perk. Does it take a lot of training?
A fair amount.  In some areas they are part of the EMS system and some of them even carry out mountain rescues.
Wow. Is there an age limit?
There are actually wide differences as certain conditions call for different types, etc..so there is often a significant variation - in our area you must be 16 to lifeguard at a pool.  Ocean is 18 I believe