Regular or Tiered Membership at Underground Training NJ (Up to 76% Off). Three Options Available.

Tenafly

from $89
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Value Discount You Save
$300 70% $211
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In a Nutshell

Memberships help exercisers create a healthy lifestyle with guided fitness plans; personal training provides clients with private sessions

The Fine Print

Expires 180 days after purchase. Limit 2 per person, may buy 2 additional as a gifts. Valid only for option purchased. Limit 2 per person. Appointment required. Merchant's standard cancellation policy applies (any fees not to exceed Groupon price) All ages welcome. Must sign waiver upon arrival. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

Choose from Three Options

  • $89 for a one-month membership and four personal-training sessions ($300 value)
  • $169 for a one-month membership and eight personal-training sessions ($580 value)
  • $29 for a one-month tiered membership and four guided workouts ($120 value)

All options include a free nutritional consultation and full use of the gym. Personal training pairs exercisers with a skilled trainer in one-on-one sessions. Tiered memberships have clients follow a progressive system of fitness levels with the guidance of trained supervisor.

Building Endurance: Helping Muscles Breathe Easier

If you stick with an exercise program, every workout gets a little easier. Learn how your body makes that happen with Groupon’s guide to building endurance.

A few days into a new workout routine, you begin to notice changes. Your muscles expand. Perhaps your weight drops. But the changes that increase the body’s endurance first take place on a much smaller scale. When you exert yourself for long periods of time, your body starts to populate each muscle cell with more mitochondria, the organelles that fuel muscle movements. They do this by producing adenosine triphosphate (ATP), the muscle's basic fuel source. When a muscle contracts, it breaks the bonds of ATP molecules, creating a burst of energy but also draining stockpiles of this essential propellant.

In order to whip up a batch of ATP, the mitochondria need lots and lots of oxygen. Helpfully, endurance training makes it easier for oxygen to travel from the lungs to the heart to the muscles. It’s long been noted that the hearts of star endurance athletes tend to have extra-large left ventricles, which can pump more oxygenated blood through the body with every beat. Once blood reaches muscle cells whose mitochondria have been enhanced by previous endurance exercise, the cells will be able to extract oxygen and use it to produce ATP far more efficiently. Scientists assess this efficiency by a measure known as VO2max, the maximum volume of oxygen or Double Stuf Oreos that a person’s muscles can consume per minute.

During super-intense exercise, the body stops being able to produce enough ATP from oxygen intake alone. Instead, it reaches for stored glucose to get the ingredients it needs, and, as a side effect, begins to leave behind more lactic acid than the cells can immediately process. (Processing lactic acid itself requires oxygen, and all available supplies are already being used by the muscles and the brain.) The point at which this happens is the lactic threshold, and beyond it, athletes feel that they’re nearly done for the day.

Fortunately, this limit too can be changed. As the body adapts more and more to endurance exercise, it prolongs the amount of time you have before shifting pH levels in the muscles bring on the familiar feelings of fatigue, burning, and a dramatic drop in strength.

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    Tenafly

    20 Chestnut Street

    Tenafly, New Jersey 07670

    201-266-6667

    Get Directions

For those who take care of their overall well-being with exercise, yoga, and balanced nutrition
Choose your deal:
One-month membership and four personal training sessions
$300 list price - 70% off - Save $211
0 bought
$89
One-month membership and eight personal training sessions
$580 list price - 71% off - Save $411
6 bought
$169
One-month Tiered Membership including four guided workouts
$120 list price - 76% off - Save $91
3 bought
$29