Curious about the slow twitch muscles our instructors are always talking about during class? Here is a quick and simplified definition of muscle fibers.
The muscle itself is composed of multiple fibers. Our muscle tissue consists of fibers (cells) that are highly specialized for the active generation of force for our muscle contraction. Skeletal muscle fibers can be broken down into two main types: slow twitch (Type I) muscle fibers and fast twitch (Type II) muscle fibers.The fast twitch muscle fibers are responsible for giving the body its speed, agility, quickness, and power.
Slow Twitch (Type 1) also known as “Red” fibers : Refers to muscle cells that contract slowly and resistant to fatigue and are utilized in endurance activities such as long-distance running, cycling or swimming. The slow muscles are more efficient at using oxygen to generate more fuel (known as ATP) for continuous, extended muscle contractions over a long time. They fire more slowly than fast twitch fibers and can go for a long time before they fatigue. Therefore, slow twitch fibers are great at helping athletes run marathons and bicycle for hours.
Fast Twitch (type 2) also known as “white” fibers : Refers to muscle cells that fire quickly and are utilized in anaerobic activities such as sprinting and power lifting. Because fast twitch fibers use anaerobic metabolism to create fuel, they are much better at generating short bursts of strength or speed than slow muscles. However, they fatigue more quickly. Fast twitch fibers generally produce the same amount of force per contraction as slow muscles, but they get their name because they are able to fire more rapidly. Having more fast twitch fibers can be an asset to a sprinter since she needs to quickly generate a lot of force.
Sculpt Studio uses the Lagree Fitness Method to target slow twitch muscles during those long long series of lunges you all love on the Megaformers. The result? Major calorie burn and quicker visible results for our clients!
*Scientific content provided by Lagree Fitness.