Hi Laura,

You may want to consider a sports drink or water with electrolytes and/or other added nutrients.  Potassium is very important to prevent cramping, for example.  Also, take a close look at your shoes and socks...try compression wear and make sure that you are walking at least 5-10 minutes before and after your running. 

It may be that you need a full 64 oz. before going out, but everyone is different.  In general, the recommendation has changed suggesting that we all require more hydration than previously estimated, especially with increased activities, so now I think the consensus is that many of us should be consuming at least an additional 16 oz. of water (above and beyond what we are typically drinking). 

Congratulations on all your progress and wishing you all the best. 

At 2 miles hydration should not be an issue. Make sure your are wearing properly fitted shoes with sufficient arch support. Also try strengthening your foot muscles (barefoot try picking up marbles with your toes. If no marbles try a towel) for 5 minutes every other day. Do a longer walking warm-up and try adding magnesium rich foods or chelated magnesium to your diet.

Personal Trainer Hollywood - Studio City