A muscular body, like a well-maintained wardrobe, helps boost confidence, improves appearances, and shields internal organs from merciless moth attacks. Remove the threat of lepidopteral damage with today's Groupon: for $30, you get six weeks of unlimited group classes at KB Fitness (a $211.50 value), located in the Almaden Plaza Shopping Center.

KB Fitness's trained staff gives health seekers all the tools they need to refashion undefined bodies into finely toned physical specimens. Six weeks of unlimited group classes (except for the Pilates reformer sessions) bolsters muscles through a personalized regimen tailored to each individual's needs, like a suit with an extra head hole. Bendable bodies can quest after inner peace with Vinyasa yoga, shape muscles into an envy-arousing picture of perfection in the hard-body sculpting class, or knuckle up to martial-arts mastery with kenpo karate. Group workouts inspire increased perspiration through their friendly, motivational spirit of camaraderie. The crowd-averse can cater to their lone-wolf sensibilities with free-style, open workout sessions held at the studio six times per week and supervised by an on-site trainer. Check out the packed weekly schedule to plan your experience.

KB Fitness's 1,650-square-foot facility contains all the necessary equipment for every class, along with towel service and complimentary bottled water to rehydrate bodies and inflate pocket water balloons. Childcare ($3 for 1 child, $5 for 2) keeps kids under a watchful eye as parents and guardians get their calorie-burning fix.