Today's run was all of 1.25 miles. Even though it was only 6:30 am, and the coolest time of the day, my left calf cramped up on me. It was hot in the bedroom and I woke up sweaty-- maybe I sweated enough while sleeping to be dehydrated? The heat's supposed to break tonight, but I'm planning in drinking plenty of water before bed and first thing in the morning, to avoid a recurrence...