Group Fitness Classes or Two or Four Private Fitness-Coaching Lessons at 503 Strength (Up to 79% Off)

Tigard Neighborhood Area 7

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It's good to get in shape for summer, when lots of people will see you lounging by the pool or trying to climb through the windows of air-conditioned businesses. Look good with this Groupon.

Choose from Four Options

  • $55 for 30 days of unlimited group fitness classes ($149 value)
  • $29 for 10 group fitness classes ($75 value)
  • $39 for two 60-minute private fitness-coaching lessons ($140 value)
  • $59 for four 60-minute private fitness-coaching lessons ($280 value)
  • Click here to view 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.

In a Nutshell

Coaches that champion comprehensive and fun fitness lead hour-long group classes or create custom routines

The Fine Print

Expires 90 days after purchase. Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. Limit 1 per visit. Limit 1 per customer. Appointment required. Must be 18 or older. Initial assessment appointment required (does not count as a class). Must use all 10 group fitness classes in 60 days. Must use all private classes in 60 days. 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