I know that they are it isn't the best thing to do to my back, but every now and then I get an urge to do an insane amount of sit-ups. However, this urge hadn't shown itself for several years, until last night. To my great surprise, cranking out one hundred sit-ups was actually almost difficult. This could be excused by the fact that I have gained twenty pounds (in a very good way) over the past few years, but the results were still shocking. Why? Because the last time I got the urge I was able to do five hundred situps. Looks like my to-do list just got longer (again).