1. Michael Masher Unit 2: P1 – Describe The Musculoskeletal and Energy Systems Response to Acute Exercise M1 – Explain the Response of the Musculoskeletal, Cardiovascular and Respiratory Systems to Acute Exercise

2. The musculoskeletal systems response to acute exercise is the build up of waste products in the muscles, causing aches and tired feeling, eventually pain. The body would go through a raise in heart rate so the performer would start to release sweat, raise in adrenaline levels Increased heart rate would cause blood to be pumped around the body faster. This then causes an increase in breathing rate, this brings more air into your lungs and in turn more oxygen. Oxygen combines with hemoglobin to for Oxyheamoglobin in red blood cells. This is then carried around the body in blood which would cause increased heart rate, therefore means that muscles that are being use get more oxygen faster than at normal heart rate. Lactic acid, a fatiguing metabolite of the lactic acid system resulting from the incomplete breakdown of glucose. ATP - Adenosine Triphosphate: a complex chemical compound formed with the energy released from food and stored in all cells, particularly muscles. Only from the energy released by the breakdown of this compound can the cells perform work. The breakdown of ATP produces energy and ADP.

3. Cardiovascular Systems Response to Acute Exercise – Heart Rate (HR), Stroke Volume (SV), and Cardiac Output (Q) increase. Blood flow and blood pressure change. All result in allowing the body to efficiently meet the increased demands placed on it. As exercise intensity increases, heart rate, stroke volume, and cardiac output increase to get more blood to the tissues. More blood forced out of the heart during exercise allows for more oxygen and nutrients to get to the muscles and for waste to be removed more quickly. Blood flow distribution changes from rest to exercise as blood is redirected to the muscles and systems that need it. Respiratory Systems Response to Acute Exercise – When you are exercising your respiratory system responses by your breathing rate increasing and you start to breathe heavily, this happens because your muscles need more oxygen so you breathe quicker so a supply of oxygen can get to the muscles, also when you finish exercise your breathing rate will decrease and start to recover. Another response from the respiratory system is the tidal volume, which increase as a response to exercise this is because the muscle needs an increase of oxygen. As well as the breathing rate and tidal volume, the pulmonary ventilation is also a response to exercise on the respiratory system. The pulmonary ventilation increases when the body starts to do exercise, this happens because like most of the other responses the muscles need more oxygen, there is also an increase in the removal of carbon dioxide.