To know how totally different types of weight coaching have an effect on the human physique, you first have to understand that there are several types of muscle fibers being exerted.
There are two classes of muscle fibers: Quick-twitch muscle fibers and slow-twitch muscle fibers1, and so they every serve a objective.
Per the Nationwide Academy of Sports activities Medication, fast-twitch muscle fibers help fast and highly effective actions whereas slow-twitch muscle fibers help endurance actions. You possibly can consider quick and slow-twitch fibers just like the tortoise and the hare. Quick-twitch fibers tire out as shortly as they will transfer, whereas slow-titch fibers help well-paced actions and are way more fatigue-resistant.
In response to superstar coach and founding father of the NWMethod, Nicole Winhoffer, you’ll see totally different outcomes should you’re lifting fewer repetitions of heavier weights than should you had been to do extra reps of lighter weights since you’re working totally different muscle fibers, and exercising them in a different way.
“Lifting heavier requires bigger dominant muscle teams (ie. bicep, tricep, quad, and glute) to finish extra work and recruit extra muscle fibers to carry the load,” Winhoffer explains. Which means these focused muscle teams will bulk up. While you carry extra reps of lighter weights, you encourage slow-twitch muscle fibers, constructing a extra even tone over time.
