5 or 10 Fitness Classes or 3 or 6 Personal-Training Sessions at Rockstar Fitness (Up to 55% Off)

Castle Rock

Value Discount You Save
$60 52% $31
Give as a Gift
Limited quantity available
6 bought

In a Nutshell

Clients burn calories and build muscle during one-on-one training or group sessions such as Total Body Tabata, TRX, and classes for seniors

The Fine Print

Promotional value expires 180 days after purchase. Amount paid never expires. Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. All goods or services must be used by the same person. Valid for all types of classes. Class schedule on merchant website. Appointment required for 1-1 sessions. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

Choose from Four Options

  • $29 for 5 small-group classes ($60 value)
  • $55 for 10 small-group classes ($120 value)
  • $79 for 3 one-on-one training sessions ($165 value)
  • $149 for 6 one-on-one training sessions ($330 value)
  • Click here to see the class schedule.

Building Muscle: Cells on the Move

Read on to learn exactly how fitness classes leave you with more muscle or better tone.

Bulky upper-body muscles might have hindered early humans who had to chase their prey across the plains, but it could help those who often had to climb trees to adjust their satellite dishes. That’s why the body builds muscle according mostly to use: do enough curls, and the biceps expand. As anyone who has experienced post-workout soreness could intuit, those curls are actually a form of controlled damage, making thousands of miniscule tears to the muscle tissue that beckon autoimmune cells to show up alongside testosterone and other hormones. The white blood cells help switch on satellite cells, which are similar to stem cells. Before they’re activated, satellite cells aren’t doing much—instead, they lie dormant around muscle fibers until they’re called into action to repair torn tissue.

This isn’t the only kind of cellular transformation at work in growing muscles. Long muscle cells, which contain several nuclei, can also begin to change type after a workout. Certain kinds of muscle fibers are equipped to handle brief bursts of effort but will quickly become tired if asked to do more intense work. These are the first to disappear as someone starts an exercise routine, as they’re converted into fibers with more endurance. This principle is so dramatic that a sports scientist can generally tell whether someone is a professional athlete or a professional mattress model by examining a minute sample of muscle tissue.

Merchant Location Map
  1. 1

    Castle Rock

    727 Wilcox Street

    Castle Rock, CO 80104

    +13038027027

    Get Directions

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