Yesterday I worked from home (WFH). This allowed me to sleep longer and still manage a 3-mile run before the workday got rolling. The only reason I went for a run at all was to burn calories, not because I was worried about the 9 miles I will run tomorrow. If the training had called for a longer run, say 5 miles, I would have flat-out skipped it. The difference between sneaking off for a 3 mile instead of a 5 miler, especially in this heat is significant (25 versus 40 minutes).