Dumbbells aren't necessary to forge ripped biceps, as evidenced by the muscles Sylvester Stallone formed while throwing refrigerators at his stove. Flex your might with this Groupon.
$39 for Four-Week Outdoor Boot Camp ($175 Value)
Exercisers gather at one of three shoreline parks—Tom McCall's Waterfront Park, Willamette Riverfront Park, or Elizabeth Caruthers Park—where they pursue healthier bodies through sun-drenched, windblown outdoor exercise. They powerwalk or jog over carpets of pine needles, then lunge toward the rising sun during morning sessions. Soft grass cushions hands during torso-heaving pushups, which trainers intersperse with entertaining cardiovascular drills and games, such as tag or the ever-popular Flee From These Bees I Just Released.
When he's not whipping the youth soccer players of the Portland Timbers into shape, Waterfront Fitness's owner Jason Bell heads to the city’s riverside parks to shape up everyday citizens with rigorous athletic drills. He and his team of qualified instructors convene beneath Portland's sky during all but the coldest months, incinerating calories during one-hour boot camps held every morning and evening. These sessions include activities such as strength circuits, Interval training, games, and box fit, which features high-speed punching drills and cardiovascular throwdowns beneath the boughs of mighty park trees. The trainers also provide general and sport-specific personal training for exercisers in search of an intense, highly personalized regimen to build muscle or burn fat.