Introduction -- The frenemy within -- Why exercise is good for your brain-and why your brain is being a pain in the ass about it -- Get moving-or at least get up -- How to get started when you'd rather lie down -- That counts -- Why your workout habits don't need to be as formal, consistent, extensive, or typical as you think they do -- Break it up -- How to build a modular workout that adapts to your energy level -- Around the bend -- Why flexibility is good for more than just your schedule -- Heavy stuff -- Carry that weight, as in your problems but also these weights -- Run from your problems -- Getting your heart rate up without having an anxiety attack -- Throwing in the towel -- Deciding when to take a break, skip a day or quit -- Appendix -- Tracking your workouts and staying motivated.