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 $49, you get three personal-training sessions (a $100 value each) and a three-month membership (a $267 value) to Gold's Gym on West 54th Street (a $567 total value).

A leader in the industry of group sweating for more than 45 years, Gold's Gym entices fitness fiends with a stable of first-class fitness equipment in their three-level, 40,000-square-foot muscle-honing emporium. Clients bolster confidence and raise heart rates with a regimen of three personal-training sessions, during which certified trainers tailor exercises to fit specific needs. The one-hour sessions take place in the first month of the membership, so patrons can put trainers' expert squat, bench-press, and wall-punching techniques to use for the bulk of their membership. With regular visits to the gym, health hounds can pound out sets on weight-training machines or turn noodly leg muscles into supernatural paradoxes of beauty and power with extensive stints on one of Gold's 120 cardio machines.

Within Gold's expansive studio, trainees can partake in more than 90 weekly group fitness classes, ranging from the relaxing statuesque flow of yoga sessions to the anaerobic Daniel LaRusso impressions of the BodyCombat classes. For client convenience, the gym stays open from 5 a.m. to midnight on weekdays. Likewise, those who opt to join the gym within 30 days of the end of the three-month trial will not be charged an enrollment fee.