Presentation on theme: "Training and the cardiovascular & pulmonary systems"— Presentation transcript:
1Training and the cardiovascular & pulmonary systems Option B2&3Training and the cardiovascular & pulmonary systems
2DefineTotal Lung Capacity - The total amount of air your lungs can hold after forced inhalation.Vital Capacity - Maximum amount of air you can expel (using a forced exhalation) after forced inhalation.Tidal Volume - Amount of air inhaled and exhaled normally.Ventilation Rate- The rate at which air enters and leaves lungs
4Explain the need for increase in TV and VR during exercise Ventilation Rate (VR) – the process of bringing fresh air into the alveoli and removing stale airExercise increases the ventilation rate and tidal volumeMaintains high conc. gradient of oxygen and carbon dioxide in the appropriate locations
5Effects of training on ventilation cont’d Training involves repeating exercises that bring the body into a desired state of fitnessIt reduces ventilation rate at rest due to increased efficiency of oxygen absorption and carbon dioxide excretion
6VR and TV cont’dIncreases with training due to the strengthening of the diaphragm and intercostal musclesVital capacity increase is marginal at best
7Measuring heart function Heart Ratethe number of times your heart beats in a minute
8Stroke Volume – the volume of blood pumped out with each ventricular contraction
9Heart Function Cont’dCardiac Output = the volume of blood pumped out by the heart per minuteVenous Return = the volume of blood returning to the heart via the veins per minute
10Effects of exercise on the cardiovascular system 1. venous return increases2. c.o. increases as a result of increased stroke volume but primarily heart rate…… due to increased carbon dioxide production during exercise, which in turn lowers blood pH…..detected by chemoreceptors, info sent to brain…nervous stimulation of pacemaker increases h.r.
11Distribution of blood during exercise Receive more:SkinHeart wall &Receive less:Kidneys, stomach, intestines.Brain receives same all the time
12Effects of training on heart Can increase the thickness of the heart wall and the volume of the ventricles = increased stroke volume at rest and playCan reduce heart rate at rest to 50 beats/min….due to increased s.v.At any level of exercise h.r. is lower after training due to increase in s.v.Max h.r. not greatly effected by training BUT due to increased s.v. athletes can perform at greater intensities
13ERYTHROPOIETINA glycoprotein hormone that stimulates the production of red blood cells by stem cells in bone marrow.Produced mainly by the kidneys, it is released in response to decreased levels of oxygen in body tissue.
15Risks and Benefits of EPO Increasing PVC (packed cell volume)…a measurement of r.b.c. as a proportion of blood volume by using EPO increases overall oxygen load the blood can carry = greater anaerobic respiration and muscle contractionRisk = thrombosis =