Responses of the muscular system to a single exercise session Flashcards
How does the blood supply increase during exercise?
Blood carries oxygen around the body which is needed for energy. When we exercise there is an increase in demand for oxygen and glucose in the muscles, which is met by an increase in blood supply. Vasodilation occurs to allow more blood to enter the muscles. Blood flow increases significantly to ensure that the working muscles are supplied with the oxygen they need as well as to remove waste products such as carbon dioxide.
How does muscle temperature increase during exercise?
When we produce energy for exercise it creates heat. The more energy is needed the harder you work therefore more heat is produced.
How is muscle pliability increased during exercise?
The warming of your muscles during activity makes them more pliable and flexible . Pliable muscles are less likely to suffer from injuries such as muscle strains.
What is lactate accumulation?
During exercise, a build up of lactic acid, which is a waste product, is produced during anaerobic exercise . This build up of acid in the muscle tissue will result in rapid fatigue and will impede muscular contractions if not removed quickly.
What are microtears? How do they occur?
During resistance training such as weight training, your muscles are put under stress to the point that tiny tears occur in the muscle fibres . These micro tears cause swelling in the muscle tissue which causes pressure on the nerve endings and pain. Training improvements will only be made if the body has rest and time to repair these micro tears, making the muscle a little bit stronger than it was before.
What is Delayed onset of muscle soreness (DOMS)? How is it caused?
DOMS is the pain felt in muscles 24-48 hours (typically) after taking part in strenuous exercise. The soreness usually occurs at least a day after exercise and can last up to 3 days. DOMS are caused by the micro tears caused when you exercise , particularly if you are unaccustomed to the intensity of exercise. DOMS is often associated with exercises where eccentric muscle contraction has occurred.
