Month of Unlimited Classes for One or Two at CrossFit Killer Instinct (Up to 65% Off)

Crossfit Killer Instinct

Value Discount You Save
$125 60% $75
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Limited quantity available
Over 10 bought

In a Nutshell

CrossFit box filled with weightlifting mainstays hosts daily-changing workouts to sculpt strong, toned bodies regardless of fitness level

The Fine Print

Promotional value expires 120 days after purchase. Amount paid never expires. Not valid for clients active within the past 2 month(s). Limit 1 per person, may buy 1 additional as gift. May be repurchased every 90 days. Limit 1 per visit. Valid only for option purchased. All goods or services must be used by the same person. Reservation required. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

Choose Between Two Options

  • $50 for a month of unlimited CrossFit classes for one ($125 value)
  • $87 for a month of unlimited CrossFit classes for two ($250 value)

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.

Customer Reviews

Great atmosphere and facility.
Alison G. · June 18, 2016
Very friendly atmosphere! Looking forward to working out with these guys.
Alison G. · June 18, 2016
The trainers are awesome! They make you feel confident and enjoy coming back!
Brittany Y. · June 16, 2015
Merchant Location Map
  1. 1

    Crossfit Killer Instinct

    737 Harry McCarty Road

    Bethlehem, GA 30620

    +16789635395

    Get Directions

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