Although feeling the burn during a workout is generally a good sign, feeling the burn while sitting on the sofa means your sofa is in the fireplace. Engage in controlled, constructive body burning with today's Groupon: for $39, you get 10 group fitness classes and 10 open-gym passes at Rep Gym (a $100 value) in Coeur d'Alene.

Soma shapers can choose to take invigorating group cardio and toning classes or drop by Rep Gym to work out on their own with today’s deal. Guests redeem 10 class vouchers for TRX, Purmotion, or Zumba classes offered throughout the week on a flexible schedule. The gym's TRX cardio-circuit class challenges body-molders with a chiseling 45-minute combo of resistance strength training and drills. Guests unfamiliar with TRX equipment can take a 45-minute beginner class, which familiarizes limbs with the body-refining routine. Physique formers can also slim stomachs and tone thighs to Latin beats during 45-minute or one-hour Zumba classes. The Purmotion circuit-trainer tower shapes bodies with a jungle gym of workout gadgetry, including pulleys, ropes, and pull-up bars, which inspire presidential-fitness-award flashbacks during each 45-minute class.

Guests who buy today's Groupon will also receive 10 vouchers to drop by the gym to use free weights, benches, and cardio machines at their leisure. Relax and workout inside Rep’s spacious, clean studio with wood floors and large windows to let natural light flood in without letting imaginary friends out. Before or after workouts, guests can stop by the on-site cafe for a latte or protein-infused smoothie (not included in today's deal).