Your endurance will improve the more time you spend in the pool. I started out the summer not being able to do one length of freestyle due to breathing difficulties. Tips here from TE'ers, plus working on my own has made me a "serviceable" and improving swimmer. I can now swim more than an hour without taking a break. I'm not fast but I don't get tired. That's after six weeks. I still don't do flip turns and am not sure I ever will (the rebel in me!).
Check out the Total Immersion website (I believe Fiddlefreek suggested it to me and it has made all the difference). I have the book and the Freestyle & Breathing DVDs.
If you are like me, you need to go at your own pace and get comfortable in the water. I'm actually tempted to take a TI class to improve my technique.



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