Since the rise of the Internet, people have struggled to tear their now-useless phone books in half. Bulk up to succeed where others have failed with today’s Groupon: for $25, you get a 30-day membership to Frog's Fitness (a $60 value). This deal is valid at Frog's Fitness's four locations in San Diego, Encinitas, and Solana Beach.

Frog's Fitness eases members into healthier living with access to first-rate exercise equipment and a bevy of sweat-inducing group fitness classes. Torch calories after a long day of gravy rafting with a cardiovascular rowing course, or turn your torso into a supernatural paragon of definition with a core-conditioning class. Frog’s Fitness's site-specific training and services include aquatic fitness programs and [tennis] (http://gr.pn/kvCqDF) (extra fees may apply for advanced classes and lessons). Kranking classes challenge patrons to power bicycle-like machines with their hands and operate weighted chopsticks with their feet in a multipronged workout as intense as a checkers game against the Hulk. Membership also includes an initial health and fitness assessment, and every location except the Hotel Circle South location offers supervised child-care with advance reservations.