I'm totally out of shape

I've just found a DDR machine (of the good Euromix 2 kind) near the place I live, and I barely managed to do what a couple of years ago would be just a warmup - one Normal nonstop plus three 8/9-feeters (today it was Crash, Candy, and Tsugaru).

I should start attending a gym or something like that or it will only go down from here.