Humanity's hunter-gatherer forbearers spent a great deal of time exercising in order to successfully combat the packs of carnivorous treadmills that roamed the primordial plains. Honor your ancestors with today's Groupon: for $10, you get a 30-day membership with Black Card benefits at Planet Fitness in Henderson (up to a $58.99 value). Membership includes the following benefits:

• Unlimited guest privileges
• Unlimited tanning
• Unlimited fitness training
• Unlimited use of massage chairs
Half-price cooler drinks

Planet Fitness provides a judgment-free zone where guests of all ages and fitness levels can take advantage of myriad aerobic and strength-training options, as well as the club's friendly, down-to-earth atmosphere. Pummel muscles on the extensive selection of brand-name sinew-strengthening equipment and free weights, or, with the help of a trained instructor, design a custom workout program based on exercise history, medical background, and goals of completing an underwater bicycle race. Thirty-minute small-group classes concentrate on strengthening and toning specific body parts, and others offer full-body circuit workouts designed to give each and every lackadaisical muscle a Popeye-like infusion of metaphorical spinach.

The Henderson location's décor infuses visitors with cheerful vibes, thanks to energizing hues of electric yellow and vibrant purple and an array of diverting televisions installed above the cardio equipment. With unlimited guest privileges, members can bring a workout companion for morale support or a small bear to speed up their running. After a blood-pumping workout, members can relax and soak up a golden glow with unlimited tanning. When the 30 days are over, if Groupon holders decide to join, Planet Fitness will waive the $99 enrollment fee for new members.