Fast & Slow Twitch Muscle Muscles are the functional units of tissue that move the skeletal system. There are two primary forms of muscle fibers, fast twitch muscles and slow twitch muscles. Fast twitch muscles contract fast and exert large amounts of power in a quick manner.People with high percentages of fast twitch muscles are generally good sprinters and are strong individuals Slow twitch muscles can put out steady power for long amounts of time and perform optimally in endurance training in sports such as cross country.
Muscles are the functional units of tissue and have three main functions, motion, heat production and maintaining posture. There are also three primary types of muscles Skeletal muscle, smooth muscle and cardiac muscle. …show more content…
Another characteristic is contractility which is where the muscles shorten in length usually picking up objects, such as a bicep curl. Extensibility is the ability for muscle to be pulled and stretched. An isometric contraction is where muscle fibers contract but no fibers are being shortened. An example of which is if one was to carry a weight out in front of the body, the weight pulls are arms down, but the muscles work to keep the weight out in front of the body. Elasticity is when the muscle returns to the original shape and length after contraction or extension. An example of which is the shrinking back to original form after the hamstring muscle has been stretched by touching the …show more content…
The soleus calf muscle has over 70% of type 1 slow twitch muscle composed into the muscle group. The gastrocnemius lateralis contains over 50% type 2 fast twitch muscle. In the study both muscles amplitudes increased above rest levels during short contractions of the muscle. But during lengthened contraction times both forms of muscle decreased well below normal rest values. This shows that hypertrophy of the muscle happening quicker in longer contraction times.What was also found is the fast and slow twitch muscles generate almost exactly the same amount of peak force. The big difference is the rate of transition of power from a low to high force state in a fast twitch muscle shows calcium ion sensitivity seven times greater than slow twitch muscles. Meaning that humans with higher percentage of fast twitch muscles generate higher torque and higher power, but it is not sustainable to great amounts of
Muscles are the functional units of tissue and have three main functions, motion, heat production and maintaining posture. There are also three primary types of muscles Skeletal muscle, smooth muscle and cardiac muscle. …show more content…
Another characteristic is contractility which is where the muscles shorten in length usually picking up objects, such as a bicep curl. Extensibility is the ability for muscle to be pulled and stretched. An isometric contraction is where muscle fibers contract but no fibers are being shortened. An example of which is if one was to carry a weight out in front of the body, the weight pulls are arms down, but the muscles work to keep the weight out in front of the body. Elasticity is when the muscle returns to the original shape and length after contraction or extension. An example of which is the shrinking back to original form after the hamstring muscle has been stretched by touching the …show more content…
The soleus calf muscle has over 70% of type 1 slow twitch muscle composed into the muscle group. The gastrocnemius lateralis contains over 50% type 2 fast twitch muscle. In the study both muscles amplitudes increased above rest levels during short contractions of the muscle. But during lengthened contraction times both forms of muscle decreased well below normal rest values. This shows that hypertrophy of the muscle happening quicker in longer contraction times.What was also found is the fast and slow twitch muscles generate almost exactly the same amount of peak force. The big difference is the rate of transition of power from a low to high force state in a fast twitch muscle shows calcium ion sensitivity seven times greater than slow twitch muscles. Meaning that humans with higher percentage of fast twitch muscles generate higher torque and higher power, but it is not sustainable to great amounts of