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respond to chemicals released from nerve cells |
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ability to shorten and generate force |
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Ability to be stretched without damaging the tissue |
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submaximal force (repeatedly), |
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prime movers; responsible for the movement |
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oppose the agonists to prevent overstretching of them |
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assist the agonists and sometimes fine-tune the direction of movement |
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tension development with no change in muscle length that results in no movement of body parts |
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): tension development with a change in muscle length that results in movement of a body part |
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Muscle contraction at a fixed velocity |
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Improvements in VO2max similar to adults No risk of permanent cardiovascular damage as a result of training |
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the decreased cardiovascular function that accompanies dehydration and mild hyperthermia -profuse sweating, cold skin, flu-like symptoms, dizziness, rapid pulse, shallow breathing, and headaches |
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when heat stress continues, or is worsened beyond that of heat exhaustion, physiological symptoms progress to CNS dysfunction - disorientation, confusion, psychoses -no sweating, dry skin, very hot, high temp., bright red skin, unresponsiveness |
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Lower partial pressure of oxygen leads to shortness of breath Cold, dry air promotes dehydration Acute mountain sickness (AMS) |
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Does living at high altitude improve exercise tolerance? |
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Yes, VO2max decrement is not as large Maximal blood lactate is lower AMS symptoms are less severe Air pollution irritates lungs and decreases oxygen delivery to muscles |
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can positively affect peak bone mass in children and adolescents, maintain or even modestly increase bone |
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An injury that results from chronic repetitive motions that violate the integrity of our joints |
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