Two or Four Weeks of Unlimited Interval-Training Classes at Optimum Body Fitness (Up to 71% Off)

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Up to 71% Off

Customer Reviews

35 Ratings

This is well worth the purchase. Very challenging! The trainers keep you motivated. I love it!
Cynthia B. · June 13, 2017
Great trainers
DuWayne W. · June 9, 2017
Just finished my 1st class and was a great full body workout! Excited for tomorrow.
Ivy P. · August 22, 2016

What You'll Get


Choose Between Two Options

  • $25.50 for two weeks of unlimited high-intensity interval-training classes ($65 value)
  • $37 for four weeks of unlimited high-intensity interval-training classes ($129 value)

To see the full schedule, click here.

The Cardiovascular System: How Exercise Makes it Hum

Exercise can be a little tough when you start out. Take inspiration during your next workout by understanding the good it’s doing inside with Groupon’s whirlwind tour of the cardiovascular system.

The average person’s heart beats 100,000 times a day, pushing 10 pints of blood all the way to the tips of the toes and back through 60,000 miles of vessels. Along this route, that blood stops to do a great many errands. The heart pumps blood to the lungs to collect oxygen before sending it through the rest of the body via arteries, arterioles, and capillaries. Once the tissues have absorbed the oxygen and nutrients they need, they send the waste-filled blood back to the heart through the veins to be reoxygenated and start the process again.

Every time our heart beats, what we really feel is the opening and closing of valves that push the blood through the heart’s four chambers and out to the body. When we exercise or get scared by a shrub that looked like a huge dog for a second, our brains instruct the heart to beat harder to supply the body with what it needs to fight or run. As exercise enhances the muscles over time, it also improves the function of the entire cardiovascular system.

This happens in several ways. Although exercise makes the heart work harder in the short term, this ultimately causes the body to adapt, easing the heart’s everyday tasks. In response to muscles’ demand for more oxygen and compliments, the body actually sprouts new capillaries, while prompting existing capillaries to open wider. These increased channels help lower blood pressure, since blood now encounters less resistance on its way to the extremities. The heart also becomes better at oxygenating the tissues—red blood cells increase their numbers during intense exercise.

With its insistent knocking in our ribcage, you may think the heart’s role in all this would be hard to ignore. But the earliest anatomists didn’t hear its call so clearly. Galen and Hippocrates believed the liver produced blood and spread it through the body in a centrifugal manner; meanwhile, the veins contained air, which the lungs pushed to the tissues. They also assumed this was an open-ended system, with the blood and air gradually dissipating when it reached the ends of veins and arteries—a view that would hold for another 1,500 years.

The Fine Print


Promotional value expires 90 days after purchase. Amount paid never expires. Limit 1 per person, may buy 2 additional as gifts. Valid only for option purchased. Reservation required. Must sign a wavier. All classes must be used by the same person. Classes are subject to availability. New clients or clients who haven't been within 6 months. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

About Optimum Body Fitness


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.