Physiological+Responses+to+Exercise

Physiological Responses to Exercise
 * //What happens when I begin to exercise ? //**

Body Temperature ** h ** (Increase) § Working muscles produce heat § Harder and faster = more heat. § Blood transports heat to all parts of the body = warm-up § Body quickly heats up and will overheat – response is to send blood to skin surface for cooling and to produce sweat. § Moisture on the skin cools the body quickly (25x faster than air). § (This why when you get out of the water at the beach or pool – you get cold quickly). § This enables us to exercise and perform for longer. § Sweat works just like the radiator in a car engine – circulating water keeps the engine cooler and prevents overheating.

Lactic Acid ** h ** (Increase) § Working muscles produce Lactic Acid harder and faster = more Lactic Acid § Lactic Acid is cleared by the blood. (plasma) § Lactic Acid is delivered to the Liver re-enters the blood stream – this is a slow process. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">During hard exercise blood cannot clear the Lactic Acid fast enough. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">There is a build-up of Lactic Acid – this causes muscle fatigue and we have to slow down or stop.
 * //Cori Cycle//** – ** Q **<span style="font-family: Verdana,sans-serif; font-size: 16pt;"> converts Lactic Acid into glucose which

<span style="font-family: Verdana,sans-serif; font-size: 22pt;">Heart Rate ** h ** <span style="font-family: Verdana,sans-serif; font-size: 18pt;">(Increase) § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Lactic Acid in the blood – Heart beats faster to speed up blood flow to start removing lactic acid. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Working Muscles also require Oxygen and Glucose. By speeding up the blood flow more O <span style="font-family: Verdana,sans-serif; font-size: 11pt;">2 <span style="font-family: Verdana,sans-serif; font-size: 16pt;">and glucose can be delivered to the working muscles. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Working Muscles also produce Carbon-dioxide and water. These must be cleared away from the muscle by the blood. Faster blood flow allows faster removal of water and CO2. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">HR remains high after we stop exercising – blood clearing the Lactic Acid, CO <span style="font-family: Verdana,sans-serif; font-size: 11pt;">2 <span style="font-family: Verdana,sans-serif; font-size: 16pt;">& water.

<span style="font-family: Verdana,sans-serif; font-size: 22pt;">Breathing Rate ** h ** <span style="font-family: Verdana,sans-serif; font-size: 20pt;">& <span style="font-family: Verdana,sans-serif; font-size: 22pt;">Tidal Volume ** h ** <span style="font-family: Verdana,sans-serif; font-size: 18pt;">(Increase) § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Working Muscles require Oxygen. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Speeding up the Breathing Rate more O <span style="font-family: Verdana,sans-serif;">2 <span style="font-family: Verdana,sans-serif; font-size: 16pt;"> can be absorbed by the blood and delivered to the working muscles. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Taking deeper breaths (Tidal Volume) allows more air to flow into the lungs, therefore more O <span style="font-family: Verdana,sans-serif;">2 <span style="font-family: Verdana,sans-serif; font-size: 16pt;"> can be absorbed by the blood. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Working Muscles also produce Carbon-dioxide and water. These must be cleared away from the muscle by the blood to the Lungs. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Increased breathing Rate & Tidal Volume allows us to exhale water and CO <span style="font-family: Verdana,sans-serif;">2 <span style="font-family: Verdana,sans-serif; font-size: 16pt;"> faster. § <span style="font-family: Verdana,sans-serif; font-size: 16pt;">Breathing Rate remains high after we stop to clear CO <span style="font-family: Verdana,sans-serif;">2. For Further Information Click [|Here:]