One or Two-Month Gym Membership with Option for Personal Training at The Omni Fitness Center (Up to 82% Off)

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Up to 82% Off

Customer Reviews

6 Ratings

The gym I have been looking for. Clean clean clean!
John J. · August 15, 2016

What You'll Get


Choose from Four Options

  • $19 for 1 Month Gym Membership ($40 value)
  • $39 for 2 Month Gym Membership ($80 value)
  • $49 for 1 Month Gym Membership with 1 Hour of Personal Training and 1 Hour of Health Coaching ($275 value)
  • $79 for 2 Month Gym Membership with 1 Hour of Personal Training and 1 Hour of Health Coaching ($315 value)

Eccentric Muscle Contraction: The Rock-Solid Core of Pilates

Pilates aims to build muscle strength and definition without unnecessary bulk. Stretch your mind around Groupon’s study of eccentric muscle contractions to understand one of its major tools.

Anatomists identify three types of muscle contraction: concentric, eccentric, and isometric. Isometric contraction occurs when a muscle resists a force without moving or changing its length. Concentric contraction can be exemplified by a set of rapid crunches: the ab muscles repeatedly shorten during the emphasized upward movement, and often don’t revert fully to their relaxed state until the set is complete or the gym teacher looks the other way. Eccentric contraction, on the other hand, is what happens when the muscles resist a force as they lengthen—as they do in the Pilates version of a crunch, the roll down.

To build any muscle, you need to do some controlled damage to its fibers, prompting the body to generate new muscle cells to make repairs. And eccentric muscle contractions are especially good at doing this. Pilates, like almost any form of exercise, involves all three types of contractions, but in characteristic movements such as the roll down the emphasis is on the downward movement. Students carefully control their abs and resist their own body weight as they slowly relax back onto the floor, challenging the muscles in their elongated state.

Eccentric exercises force muscles to work harder than they would in a concentric state—which is why, to a Pilates instructor, 5 slow, perfectly-controlled roll-downs are more productive than a quick set of 50 crunches. This phenomenon explains why beginning Pilates students can experience muscle soreness the day after a deceptively easy workout. Besides trying to prevent addiction to IcyHot, Pilates instructors limit rep quantities because muscles tend to revert into concentric contraction as they tire, which can counteract any gains in flexibility.

The Fine Print


Promotional value expires 180 days after purchase. Amount paid never expires. May be repurchased every 90 days. Limit 1 per person, may buy 1 additional as gift. Limit 1 per visit. Valid only for option purchased. All goods or services must be used by the same person. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

About The Omni Fitness Center


By purchasing this deal you'll unlock points which can be spent on discounts and rewards. Every 5,000 points can be redeemed for $5 Off your next purchase.