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67 Cards in this Set

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ATP

Is our energy currency found in all our cells; when broken down it will release stored energy
What are our main energy sources?
Glucose/Glycogen, Amino Acids, Glycerol and Creatine
Mitochondria
Is within the cell where chemical reactions of aerobic production take place
What are the advantages of an Athlete using the aerobic system?
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
What are the drawbacks of the aerobic system?
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
EPOC
Volume of oxygen consumed during recovery above that which normally would have been consumed at rest during the same period of time
What is fast replenishment of EPOC?
The first component where o2 consumed is used to re saturate myoglobin and resynthesise ATP and PC, usually takes 2-3mins
What is the slow replenishment of EPOC?
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
VO2 max
The max volume of o2 that can be utilised or consumed by the working muscles per min (ml/kg/min)
What are the factors that affect VO2 Max?
Lifestyle, Genetics, Gender, Training, Body Composition, Age andPhysiology
Respiratory Exchange Rate
A method of determining which metabolic fuel is predominately in use during exercise
How is Respiratory Exchange Rate calculated?
Carbon dioxide expired per min / Oxygen consumed per min
Advantages of ATP-PC system?
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
Disadvantage's of ATP-PC system?
Only lasts for around 10 secs and Resynthesise can only take place when sufficient O2 present
Advantages of Lactic acid system
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
Disadvantages of Lactic acid system
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%)
OBLA
The point at which lactic acid begins to accumulate in the blood. Usually taken when concentrations of lactic acid reach 4mmole/litre of blood
Factors affecting lactic acid accumulation
Exercise intensity, Respiratory exchange rate, Muscle fibre type, Rate of blood lactate removal and The trained status of the working muscles
Actin
Thin protein filament found in muscle cells that together with myosin form sarcomeres
Myosin
Thick protein filament that together with actin form sarcomeres
Sarcomere
Contractile units of skeletal muscle which are composed of two myofilaments (actin & myosin)
Slow twitch muscle fibre
Type of muscle fibre that uses O2 to produce energy - endurance based activities
Fast twitch muscle fibre
Type of muscle fibre that has a high glycolytic capacity (anaerobic) - speed and power activities
Motor Unit
Motor nerve and the group of muscle fibres that it controls
All or none law
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
Spatial Summation
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
Creatine Supplements
Consumption of creatine monohydrate in powder, capsule or liquid form which can increase levels of phosphocreatine stored in a muscle cell
Positives of Creatine Supplements
Boosts maximal strength and lean muscle mass so good for weight lifters and sprinters
Negatives of Creatine Supplements
Abdominal cramps, water retention/bloating, diarrhoea and weight gain
Negatives of Herbal remedies
reacting adversely with prescription drugs or testing positive to banned substances
Bicarbonate of Soda
By drinking a solution of this the PH of the blood increases making it more alkaline
Advantages of Bicarbonate of Soda (Soda Loading)
Enhances the buffering capacity of blood, and the the threshold of lactic acid system can be extended so can work at higher intensities
Disadvantages of Bicarbonate of Soda (Soda Loading)
Bloating, stomach cramps and nausea
Caffeine
A mild stimulant that occurs naturally and found in coffee, tea and colas
Effects of not keeping Water and electrolyte unbalanced
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
Rh EPO
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
Advantages of Rh EPO
Enhances the O2 carrying capacity of the blood, Increases a performers VO2 max
Disadvantages of Rh EPO
Increase the blood viscosity- lead to clotting & heart failure, the natural form of EPO is affected
Anabolic Steroids
Group of synthetic hormones that promote the storage of protein and the growth of tissue
Advantages of Anabolic Steroids
Able to train harder, recover quicker from high intensity work-outs and increase muscle size pus strength
Disadvantages of Anabolic Steroids
Liver damage, heart failure, increased aggression, mood swings, development of masculine features in females, reduced sperm count in males
Human growth Hormone
Synthetic product that mimics the body's natural growth hormone
Advantages of Human growth Hormone
Increase in muscle mass/strength, increased bone density, decrease in body fat
Disadvantages of Human growth Hormone
Enlargement of internal organs, heart failure, high BP, abnormal development of bone tissue and increased risk of some cancers
Plyometrics
Type of training designed to improve power, strength and speed in the trained muscles
PNF
Stretching technique that overrides the stretch reflex to enable a performer to achieve a greater range of movement at a joint
Altitude Training
Type of training usually 2500m above sea level. The reduced pO2 of oxygen causes the body to compensate by producing more red blood cells
Perceived benefits of altitude training
Increased concentration of red blood cells, increased concentration of haemoglobin and enhanced O2 transport
likely drawbacks of altitude training
Expensive, altitude sickness, due to lack of O2 training at higher intensities is difficult, detraining, benefits soon lost when back at sea level
Ways which the body disperses heat
Conduction, convection, radiation and evaporation
Convection
Process of losing heat through contact between the skin and moving air or water molecules
Radiation
Method of losing heat via infared ways, where heat is transferred to the environment without the physical contact with another object
Conduction
Process where heat is lost through physical contact between one object and another
Evaporation
Process by which the body loses heat through the conversion of liquid as water vapour
Intrinsic factors for injury
Age, sex, body weight/composition, muscle weakness, joint hyperlaxity, poor flexibility and malalignment of body parts
Extrinsic factors for injury
Training methods, training volume, inappropriate playing surfaces, poor equipment, bad clothing such as footwear and environmental conditions
Hyperbaric chamber
Chamber that delivers 100% pure O2 at v.high pressure to promote recovery of injured athletes
Oxygen tent
Chamber designed to mimic conditions at altitude training and are used to maintain fitness levels while injured
Ice Baths
Believed to reduce muscle soreness and tissue swelling that accompanies hard training or competition
DOMS
The painful & tender muscles often experienced 48hrs following exercise
How to avoid DOMS
Warm up thoroughly, cool down, go from low intensity sessions to high intensity, limit the amount of eccentric contractions at begging of session
Inertia
Reluctance of a body to move or change its state of motion
Newtons 1st Law
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
Newtons 2nd Law
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
Newtons 3rd Law
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
Factors that affect shot put throw
Velocity of release, height of release, angle of release
Angular Momentum
=Moment of inertia X Angular Velocity