More people than ever are living a sedentary lifestyle: waking up in their race-car beds, driving to work in their race cars, sitting for eight hours in the passenger seats of experimental race cars as men in lab coats slam them into concrete walls, and then driving home again. Race to fitness with today's Groupon: for $20, you get one registration to The Dirty Dash 10K mud run on Saturday, July 9 at PGP Motorsports Park in Kent (up to a $50 value, depending on registration time). The race begins at 9 a.m. with waves of participants going until 4 p.m.

The Dirty Dash fuses muck with mettle in a muddy 6.2-mile run speckled with slatternly obstacles. Seasoned sprinters and rookie runners will traverse walls, scale viscous mountains of goop, and launch down a muddy slop n' slide in an experience akin to bodysurfing through one of Paul Bunyan's crud-caked boot grooves. Run alone or in a team in this anything-goes competition that celebrates defilement, speed, and community. After the race, Dash officials will hand out awards for numerous categories, such as the dirty 'stache award, cleanest-name award, and filthiest-family award.

The parking lot opens at 7 a.m. so runners can stretch, relax, or practice mud-puddle backstroking before the competition. A portion of the proceeds from the Dash go toward organizations, including The Leukemia & Lymphoma Society, and spectators can purchase water balloons to financially support a local charity before pelting mud-covered participants. Runners should bring a towel and a bag for dirty clothes and shoes, but mud-removal cleansings are included in today's deal so guests don't have to worry about sullying pristine car seats or leaving a trail of glop behind them as they levitate home.