Joining a gym gives you the opportunity to work out as much as you want, much like getting locked in a stairwell. Step up your exercise routine with this Groupon.
Choose Between Two Options
- $39 for a one-month gym membership for one ($175 value)
- $59 for a one-month gym membership for two ($350 value)
- Click here to see the gym schedule.
Building Muscle: Cells on the Move
Read on to learn exactly how exercise leaves 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 minuscule 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.
Rob Cantalicio has dedicated more than a decade to helping individuals work toward their health and fitness goals. At Zona Athletics, he continues this mission by leading workouts that use a variety of high-intensity exercises and functional movements to provide strength and cardio training. Throughout the course of a workout, attendees may heft medicine balls, bench-press weights, swing kettlebells, climb ropes, and perform lunges across a swath of astroturf. This variety helps keep students engaged by breaking up the monotonous routine of going to the gym, jogging on a treadmill, and dead lifting the treadmill and strapping it to your back to take home.