Hi Meredith,
Congratulations on your decision to have LASIK! I had the same procedure almost 5 years ago, but my prescription was much lower than yours. I am still amazed at the results.
I was able to workout within two days. Most patients are different from each other. Since "flaps" will be created on your corneas, they will be vulnerable to any rubbing. It's natural to want to rub your eyes.
Especially when working out, we sweat. Without knowing, you *might* run the risk of rubbing your eyes w/o realizing it. So, you may want to wear a headband or protective goggles just in case. (This may also help if you're a runner...think of the debris from the wind.)
I'm sure you will use common sense and take each day as it comes. Contact sports (like basketball) should be avoided for a few weeks. Swimming is also to be avoided since your "flaps" are at a vulnerable stage.
You may want to double check with your doctor again about your concerns. Best of luck to you!!
Josephine