Releasing sweat is an effective way to lower body temperature, as is taking a cold shower or swallowing an igloo. Keep your physique regular with today's Groupon: for $39, you get a one-month membership to and two personal-training sessions at Gold's Gym Palm Desert (a $130 value).

Gold's Gym's amiable staff oversee an army of fitness amenities well equipped to spice up tedious workouts. Cardio equipment and resistance machines work together to burn calories, tone muscles, and tag-team unwitting video-game bosses. For human camaraderie, group fitness classes corral exercisers into sessions that deploy styles such as Pilates ($4/session), GroupCycling ($3/session), and Zumba (no extra charge). Add variety with an intense hour of BodyCombat (no extra charge), which torches calories with martial-arts fighting moves, or BodyPump (no extra charge), which wields weighted devices such as barbells and prize pumpkins to build lean muscle.

To cap off a month of self-svelting, personal trainers tweak technique in accordance with each client's fitness goals during a duo of one-on-one sessions. Wind down after each workout by swigging a beverage from Gold's Gym's on-site juice bar (costs not covered by today's deal), or sizzle in the relaxing sauna, a safer alternative to lounging within an active volcano.

Although Gold's Gym Palm Desert sometimes features a discounted price online, this Groupon still offers the best deal available.