I biked around the 'hood a few times. The heart was pumping pretty hard after a so-so effort. The lungs are not firing on all cylinders.
I also finished a book that was highly rated on Amazon. It's a graphic novel by Eleanor Davis called You & A Bike & A Road. The book chronicles the author's bike trip from Tucson, AZ to Athens, GA. She's on the road for around 2 months before her knees say uncle and force her to forgo the last 10 days and hitch a ride from her husband. It was a quick read and an interesting topic. If Spandex is optional, some bike tripping might be cool one day.