Day 19 of 5am

Today I did Cardio.  I've been noticing that my shins are starting to hurt.  I think it may be time for me to work on finding other exercises that are not as stressful on my legs.  For now, I will just work harder at moving my arms to get my heart rate up and less jumping.  If anyone has any ideas for cardio that are less strenuous on the legs, please send them my way.  I know biking and swimming, but if you have any other ideas, let me know. :)