We have Tivo, but I’m watching Ads:

Most ad spots are thirty seconds long. I do a bunch of exercises every day that are each thirty seconds long. I don’t have a thirty second timer, and I don’t like to count thirty Mississippis, but I can switch on a block of ads (called a “pod” in the TV ad biz, by the way) and change to the next exercise each time a new ad starts. There are a few pretty good ads on TV these days!