Five or Ten Fitness Classes at Skinnyschool LLC (Up to 66% Off)


from $39
Value Discount You Save
$105 63% $66
Limited time remaining!
1 bought
Limited quantity available

Choose between Two Options

  • $39 for five group classes (up to a $105 value)
  • $69 for 10 group classes (up to a $200 value)

Calories: The Original Renewable Energy

The key to any workout regimen is burning calories. Discover how that happens with Groupon's exploration of the body's inner furnace.

In all of weight loss, there may be no concept less aptly named than the calorie. That's because a calorie is a unit of scientific measure—specifically, a measure of the energy needed to raise the temperature of 1 gram of water by 1 degree Celsius. Though the calorie unit we associate with food actually refers to kilo calories—meaning when we say, “2,000 calories a day,” we actually mean 2,000,000. And if the number of calories we ingest is bad news, the upside is that we are burning them all the time.

A certain amount of calories—about 60–75 percent of the calories you burn each day—are needed to sustain the body's unconscious functions, such as breathing and circulation. Known as basal metabolic rate, the specific percentage depends on factors such as size and body composition, gender, and age (typically, as people get older, fat makes up a larger portion of body weight, causing calories to burn more slowly). Digestion makes up about another 10 percent of the calories burned, leaving physical activity to account for the rest.

During exercise, the muscles contract, causing the body's adenosine triphosphate (ATP) molecules to break down as the heart continues to pump faster and faster—increasing the body’s demand for more energy. Once the muscles have depleted the day’s caloric intake, they turn to other calorie sources to fuel the fire—making weight loss possible as the body begins to sacrifice fat cells to the god of the treadmill.

  1. 1


    288 Littleton Rd.

    Unit 16

    Westford, Massachusetts 01886


    Get Directions

In a Nutshell

Students burn fat, tone muscle, and establish healthy routines with fitness classes

The Fine Print

Expires 90 days after purchase. 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. Must Signed Waiver. Ages 18 and up under 18 must have a parent/guardian signature. Class schedule and class description available online. Register online or call to reserve your spot! Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

For those who take care of their overall well-being with exercise, yoga, and balanced nutrition
Choose your deal:
5 Group Classes
$105 list price - 63% off - Save $66
1 bought
10 Group Classes
$200 list price - 66% off - Save $131
0 bought

All Locations

  • Westford

    288 Littleton Rd.

    Unit 16

    Westford, Massachusetts 01886

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