Like the framework of a mighty skyscraper, the core helps humans hold up the weight of the sky. Stay firm against the firmament with today's Groupon to Novato Pilates. Choose between the following options:

• For $50, you get five group Pilates Springboard classes (a $100 value).
• For $75, you get five group Pilates Reformer classes (a $150 value). The three-session prerequisite for Reformer classes is waived for Groupon customers.

Novato Pilates’ seasoned trainers motivate muscles to adopt stronger, longer shapes with Springboard and Reformer classes. Springboard sessions––kept personal by a four-student limit––tone and fortify sinews via resistance exercises that utilize springs attached to a wall-mounted board. The specialized workouts are intended to improve core strength, flexibility, coordination, and balance, with springs offering motivation culled from their years working with out-of-shape mattress frames.

Also boasting intimate class sizes, Reformer classes utilize the bed-like frame and rolling carriage of a Pilates Reformer machine to guide movements along beneficial lines. Supine, standing, and kneeling motions help tone and lengthen individual body components, and have been credited with myriad other benefits such as reduced joint pain, improved posture, and expanded hiding-place options during games of hide-and-seek. All classes last 55 minutes, with Reformer sessions Monday at noon, Thursday at 3:30 p.m., Friday at 11:00 a.m., and Saturday at 9:00 a.m., and Springboard sessions offered Monday and Wednesday at 5:30 p.m., as well as Tuesday and Thursday at 10:00 a.m.