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Scientific Basis of Fitness

Study energy production system

AB
EnergyAll forms of energy is associated with motion
Mechanical work of muscle contractionThe protein filaments of muscle fibers directly convert chemical energy into mechanical energy.
Chemical workPerformed by all cells for growth and maintenance.
Transport workA continual expenditure of stored energy is required to accomplish this "quiet" form of biological work.
Potential energyEnergy in position.
Kinetic EnergyEnergy in motion.
Aerobic exerciseTakes place in the presence of oxygen.
Anaerobic exercise(Nonoxidative exercise) involves intense effort of short duration and leads to the production of lactic acid.
Lactic acidA sort of promissory note that insures the repayment of the oxygen debt.
Anaerobic ThresholdA commonly used term meant to describe the level of oxygen consumption at which there is a rapid and systematic increase in blood lactate concentration.
ATPEnergy currency of the body
Slow-Twitch muscle fiberIs efficient at using oxygen.
Fast-oxidative-glycoliticIs a faster contracting type of fiber that is also capable of using oxygen.
Fast-glycolytic muscle fibersA fiber that isn't well suited for aerobic or oxygen-using metabolism.
Maximal Oxygen IntakeThe maximal rate at which oxygen can be consumed per minute, the power or capacity of the aerobic or oxygen system.
Recovery Oxygen UptakeThe oxygen in excess of the resting value consumed during recovery from exercise, whether it is small from light exercise or large from heavy or exhaustive exercise.
Isometric exerciseType of exercise when the muscle remains the same length.
Isokinetic exerciseType of exercise done with a machine to regulate movement/velocity.
Isotonic exerciseExercise where the muscle changes length.
GlycogenStored polysaccharide in muscle and other tissues in animals
1 gram of fat9kcals
1 gram of protein and CHO4kcals
Formula for Max Heart Rate220-Age
FIT PrincipleGuidelines for how often, how hard, and how long you should exercise
CarbohydratesMajority of your daily calorics should come from this source
Sweetest of monosaccharidesFructose
FiberProvides a sense of fullness
BioenergeticsConverting foodstuffs into energy for the body
Athletic dietsNeed more carbs than sedentary people
Endurance AthletesPossess high % of Slow-twitch fibers
SprintersPossess high % of fast-twitch muscle fibers
Warm-up componentsCardio and flexibility
Cool-down importanceMinimize the pooling of the blood
HyperthermiaExcessively high body temp caused by excessive heat production
HeatstrokeMost severe form of heat problems


Health Teacher
Sachem North High School
Lake Ronkonkoma, NY

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