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67 Cards in this Set
- Front
- Back
ATP |
Is our energy currency found in all our cells; when broken down it will release stored energy
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What are our main energy sources?
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Glucose/Glycogen, Amino Acids, Glycerol and Creatine
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Mitochondria
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Is within the cell where chemical reactions of aerobic production take place
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What are the advantages of an Athlete using the aerobic system?
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More ATP resynthesised (36), can use this system or long periods of time, Oxidation of glycogen and fatty acids do not produce any fatiguing by-products
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What are the drawbacks of the aerobic system?
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Takes a while for oxygen to become available, transport of fatty acids to the muscle is slow and requires more o2 to break it down
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EPOC
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Volume of oxygen consumed during recovery above that which normally would have been consumed at rest during the same period of time
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What is fast replenishment of EPOC?
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The first component where o2 consumed is used to re saturate myoglobin and resynthesise ATP and PC, usually takes 2-3mins
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What is the slow replenishment of EPOC?
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Second component where o2 consumed is largely used to remove lactic acid (takes 1hr), o2 is also used to maintain cardiac & respiratory rates & normalise body temp
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VO2 max
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The max volume of o2 that can be utilised or consumed by the working muscles per min (ml/kg/min)
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What are the factors that affect VO2 Max?
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Lifestyle, Genetics, Gender, Training, Body Composition, Age andPhysiology
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Respiratory Exchange Rate
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A method of determining which metabolic fuel is predominately in use during exercise
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How is Respiratory Exchange Rate calculated?
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Carbon dioxide expired per min / Oxygen consumed per min
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Advantages of ATP-PC system?
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ATP can be resynthesised quickly (2-3mins), Is anaerobic so don't have to wait for O2, No by-products, Can be extended through creatine supplements
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Disadvantage's of ATP-PC system?
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Only lasts for around 10 secs and Resynthesise can only take place when sufficient O2 present
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Advantages of Lactic acid system
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Can last for between 10 secs and 3 mins, Is anaerobic processes so don't have to wait for O2 and any lactic acid that has accumulated can be converted into liver glycogen
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Disadvantages of Lactic acid system
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Accumulation of lactic acid reduces the intensity the activity can last for and only small amount of energy can be released by anaerobic processes (5%)
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OBLA
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The point at which lactic acid begins to accumulate in the blood. Usually taken when concentrations of lactic acid reach 4mmole/litre of blood
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Factors affecting lactic acid accumulation
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Exercise intensity, Respiratory exchange rate, Muscle fibre type, Rate of blood lactate removal and The trained status of the working muscles
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Actin
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Thin protein filament found in muscle cells that together with myosin form sarcomeres
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Myosin
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Thick protein filament that together with actin form sarcomeres
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Sarcomere
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Contractile units of skeletal muscle which are composed of two myofilaments (actin & myosin)
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Slow twitch muscle fibre
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Type of muscle fibre that uses O2 to produce energy - endurance based activities
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Fast twitch muscle fibre
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Type of muscle fibre that has a high glycolytic capacity (anaerobic) - speed and power activities
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Motor Unit
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Motor nerve and the group of muscle fibres that it controls
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All or none law
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If a motor impulse is of sufficient intensity, the motor unit is stimulated and all the muscle fibres within it will contract to their max possible extent
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Spatial Summation
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Increase in responsiveness of a nerve resulting from the addictive effect of numerous stimuli. A certain level of intensity is needed before a muscle fibre responds by contacting
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Creatine Supplements
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Consumption of creatine monohydrate in powder, capsule or liquid form which can increase levels of phosphocreatine stored in a muscle cell
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Positives of Creatine Supplements
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Boosts maximal strength and lean muscle mass so good for weight lifters and sprinters
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Negatives of Creatine Supplements
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Abdominal cramps, water retention/bloating, diarrhoea and weight gain
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Negatives of Herbal remedies
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reacting adversely with prescription drugs or testing positive to banned substances
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Bicarbonate of Soda
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By drinking a solution of this the PH of the blood increases making it more alkaline
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Advantages of Bicarbonate of Soda (Soda Loading)
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Enhances the buffering capacity of blood, and the the threshold of lactic acid system can be extended so can work at higher intensities
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Disadvantages of Bicarbonate of Soda (Soda Loading)
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Bloating, stomach cramps and nausea
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Caffeine
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A mild stimulant that occurs naturally and found in coffee, tea and colas
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Effects of not keeping Water and electrolyte unbalanced
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reduces effectiveness of circulatory system, blood comes more viscous (slows down flow to muscles), heart beats faster putting body under greater stress, fatigue plus cramps
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Rh EPO
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A synthetic product that mimics the bodys naturally occurring hormone of EPO which is produced by the kidneys and manufactures the red blood cells in the body
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Advantages of Rh EPO
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Enhances the O2 carrying capacity of the blood, Increases a performers VO2 max
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Disadvantages of Rh EPO
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Increase the blood viscosity- lead to clotting & heart failure, the natural form of EPO is affected
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Anabolic Steroids
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Group of synthetic hormones that promote the storage of protein and the growth of tissue
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Advantages of Anabolic Steroids
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Able to train harder, recover quicker from high intensity work-outs and increase muscle size pus strength
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Disadvantages of Anabolic Steroids
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Liver damage, heart failure, increased aggression, mood swings, development of masculine features in females, reduced sperm count in males
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Human growth Hormone
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Synthetic product that mimics the body's natural growth hormone
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Advantages of Human growth Hormone
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Increase in muscle mass/strength, increased bone density, decrease in body fat
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Disadvantages of Human growth Hormone
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Enlargement of internal organs, heart failure, high BP, abnormal development of bone tissue and increased risk of some cancers
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Plyometrics
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Type of training designed to improve power, strength and speed in the trained muscles
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PNF
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Stretching technique that overrides the stretch reflex to enable a performer to achieve a greater range of movement at a joint
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Altitude Training
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Type of training usually 2500m above sea level. The reduced pO2 of oxygen causes the body to compensate by producing more red blood cells
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Perceived benefits of altitude training
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Increased concentration of red blood cells, increased concentration of haemoglobin and enhanced O2 transport
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likely drawbacks of altitude training
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Expensive, altitude sickness, due to lack of O2 training at higher intensities is difficult, detraining, benefits soon lost when back at sea level
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Ways which the body disperses heat
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Conduction, convection, radiation and evaporation
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Convection
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Process of losing heat through contact between the skin and moving air or water molecules
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Radiation
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Method of losing heat via infared ways, where heat is transferred to the environment without the physical contact with another object
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Conduction
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Process where heat is lost through physical contact between one object and another
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Evaporation
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Process by which the body loses heat through the conversion of liquid as water vapour
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Intrinsic factors for injury
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Age, sex, body weight/composition, muscle weakness, joint hyperlaxity, poor flexibility and malalignment of body parts
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Extrinsic factors for injury
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Training methods, training volume, inappropriate playing surfaces, poor equipment, bad clothing such as footwear and environmental conditions
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Hyperbaric chamber
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Chamber that delivers 100% pure O2 at v.high pressure to promote recovery of injured athletes
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Oxygen tent
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Chamber designed to mimic conditions at altitude training and are used to maintain fitness levels while injured
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Ice Baths
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Believed to reduce muscle soreness and tissue swelling that accompanies hard training or competition
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DOMS
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The painful & tender muscles often experienced 48hrs following exercise
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How to avoid DOMS
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Warm up thoroughly, cool down, go from low intensity sessions to high intensity, limit the amount of eccentric contractions at begging of session
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Inertia
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Reluctance of a body to move or change its state of motion
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Newtons 1st Law
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Every body at rest, or moving with constant velocity in a straight line, will continue to move or change in that state unless compelled to change by an external force exerted on it
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Newtons 2nd Law
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The rate of change of momentum of a body is proportional to the force causing it and takes place in the direction in which the force acts
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Newtons 3rd Law
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For every force that is exerted by one body on another there is an equal and opposite force exerted by the second body on the first or for every action there is an equal and opposite reaction
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Factors that affect shot put throw
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Velocity of release, height of release, angle of release
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Angular Momentum
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=Moment of inertia X Angular Velocity
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