3, 5, or 10 Personal-Training Sessions at Fitness By Kobi (Up to 52% Off)

Gravesend

from $69
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Value Discount You Save
$140 51% $71
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3 bought
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Choose from Three Options

  • $69 for 3 personal-training sessions (a $140 value)
  • $135 for 5 personal-training sessions (a $275 value)
  • $225 for 10 personal-training sessions (a $470 value)
  • Click to see the full 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.

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    Gravesend

    2379 McDonald Avenue

    Brooklyn, New York 11223

    347-200-3698

    Get Directions

In a Nutshell

Personal trainer designs a custom workout plan to help you achieve your fitness goals

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. 24-hr cancellation notice required. Reservation required. Must be 18 or older. Must sign waiver. 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
Warm weather essentials that prep bods for the sun with tanning, toning, and beach-ready apparel
Choose your deal:
3 session personal training pack
$140 list price - 51% off - Save $71
1 bought
$69
5 session personal training pack
$275 list price - 51% off - Save $140
0 bought
$135
10 session personal training pack
$470 list price - 52% off - Save $245
2 bought
$225