According to Newton’s first law, objects in motion tend to stay in motion, which is why frequent workouts are the best way to outpace sloths intent on stealing your TV Guide. Get moving with today's Groupon: for $99, you get an eight-week express fitness challenge from Health and Fitness Challenge of Livingston, LLC and a two-month membership to 59 West Fitness in Highland (a $350 value).

The certified instructors at Health and Fitness Challenge of Livingston, LLC sculpt physiques with an eight-week express challenge that combines classes and trainer guidance with unlimited use of the 59 West Fitness gym. The program divides exercisers into groups, which meet weekly to work out and weigh-in with trainers tracking progress and confirming police reports of missing pounds. Exercisers can join groups for two grueling classes of P90X training or two relaxing beginner's yoga classes, or they can sample one of each. Hands-on sessions and nutritional guidance from certified personal trainer Stephanie Carlson helps motivate strength, cardio, and flexibility training, and at the end of the challenge, the challenge winner receives a pair of running shoes.

The express challenge is divided into three groups, with morning, afternoon and evening classes held Tuesday and Thursday; the next session begins September 10. Check the website for the most up-to-date express challenge schedule.