Earth is an alluring enigma, balanced in the void of space upon two poles over which it sensuously spins and ineffably shimmies. Harness the power of your polarity with today's Groupon for fun fitness classes at Eccentric Fitness in Bartlett. Choose between the following options:

• For $25, you get a six-week, six-class yoga package (a $50 value).
• For $35, you get a six-week, 10-class Strip to Fit package (a $90 value).

Check Eccentric's class schedule to see the current month's class dates and times. Eccentric has yoga mats available on a first-come, first-serve basis.

Eccentric Fitness's experienced dance instructor streamlines the shapes of ladies and gents with a full retinue of physique-sculpting classes. Eccentric's yoga classes accommodate exercise regimens sans vertical apparatuses. The beginner-level classes teach the stretches and poses of yoga needed to navigate complex laser mazes with ease. The Yoga for Men class tailors its sequences of asanas to inflexible Y-chromosomes, while the Yoga for Pole class fuses sun-saluting stretches with the thigh-toning techniques of pole dancing. Classes last one hour and take place at least once a week.

Strip to Fit classes burn calories, increase flexibility, and inspire jealousy in pull-up bars with low-impact sessions on the pole. Each class focuses on deep stretches, sultry swings, and waist-shrinking wiggles that work the whole body while boosting its upper portion enough to rescue witches trapped under falling houses. The class takes place two nights per week.