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2A/2B EXERCISE PHYSIOLOGY

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Presentation on theme: "2A/2B EXERCISE PHYSIOLOGY"— Presentation transcript:

1 2A/2B EXERCISE PHYSIOLOGY
©PE STUDIES REVISION SEMINARS

2 CONTENT Components of fitness Cardio respiratory endurance
Muscular strength Muscular endurance Flexibility Body composition Agility Balance Coordination Reaction time Speed Power Training principles Specificity Intensity Duration Frequency Progressive overload Reversibility

3 CONTENT Training methods Resistance training Interval training
Continuous training Circuit training Fartlek training Flexibility training Plyometrics Energy systems ATP ATP-PC system Anaerobic glycolysis (lactic acid system) Aerobic energy system Energy system interplay Nutrition Proteins Fats Carbohydrates Fuelling energy systems

4 CONTENT Immediate responses to Physical activity - CIRCULATORY
Heart rate Stroke volume Cardiac output Blood pressure Temperature regulation Selective redistribution of blood Av-o2 difference Immediate responses to Physical activity - RESPIRATORY Respiration rate Gas exchange Oxygen uptake Tidal volume Long term aerobic adaptations to training Cardiovascular adaptations to training Respiratory adaptations to training Muscular adaptations to training Summary aerobic training adaptations Long term anaerobic adaptations to training

5 TRAINING PRINCIPLES - SPECIFICITY
Involves the training of SPECIFIC energy systems, fitness components, muscle groups, positions and roles within a given sport. This information is gathered through a games analysis to understand the specific demands of the sport Athletes get what they train for – swimming training does not improve cricket skills. To ensure the principle of specificity is applied, we have coaches specific to playing positions to ensure a professional athletes training is tailored towards the individual demands of the position Home ©PE STUDIES REVISION SEMINARS

6 TRAINING PRINCIPLES - INTENSITY
Amount of effort applied in a training activity or session. Measured using following: Heart-Rate (%HR max) Oxygen uptake (%VO2 max) Lactate concentration Maximal speed Rating of perceived exertion charts TRAINING ZONE >85% max HR Anaerobic training 65-85% max HR Aerobic training zone <60% max HR Fat training zone Home ©PE STUDIES REVISION SEMINARS

7 ©PE STUDIES REVISION SEMINARS
TRAINING METHODS RESISTANCE (WEIGHTS) TRAINING Manipulation of repetitions, sets , %1RM and recovery between sets determines type of weights training Local muscular endurance Hypertrophy Strength Power Speed of contraction %1rm Volume (sets x reps) Recovery Endurance medium 40-50% 2-3 x 15-30 30sec-1min Hypertrophy slow 65-75% 4-6 x 12-15 Strength 70-100% 3-5 x 1-10 2-3min Power fast 30-60% 2-3 x 10-12 ©PE STUDIES REVISION SEMINARS Home

8 ©PE STUDIES REVISION SEMINARS
TRAINING METHODS PROPRIOCEPTIVE NEUROMUSCULAR FACILITATION (PNF) Advanced form of flexibility training involving the contraction and stretching of specific muscle groups Should only be performed under the guidance of individuals as there is a risk of overstretching causing injury STEP 1 - assume the position to stretch. Extend the body limb until the muscle is stretched and slight tension is felt. STEP 2 - The athlete then contracts the stretched muscle for approx sec whilst the partner inhibits all movement by providing resistance. STEP 3 - The muscle group is relaxed, then immediately pushed past its normal ROM for approx seconds. ©PE STUDIES REVISION SEMINARS Home

9 3 ENERGY SYSTEMS ATP/PC SYSTEM
ANAEROBIC GLYCOLYSIS (Lactic acid system) AEROBIC ENERGY SYSTEM O2 Required No Yes Speed of energy supply Very fast Fast Slow Fuel Source Creatine Phosphate Carbohydrates Carbohydrates &fats (protein in extremes) Amount of ATP Production Limited Unlimited By Products None Lactic acid CO2 ,H2O & Heat Duration 0-10sec Up to 2min Forever Cause of fatigue Limited supply ATP/PC Lactic acid production Activity Power based activities Sprint endurance Long duration

10 ENERGY SYSTEM INTERPLAY DURING EXERCISE TO EXHAUSTION
Total energy demand AEROBIC ENERGY SYSTEM Main source of energy from 30sec + (point when oxygen supply has increased sufficiently to contribute ATP) Unlimited capacity to work unless insufficient fuel supply (food) ATP/PC SYSTEM Main source of energy in first 10 sec Peaks in output at approx 5sec Fatigues quickly due to depletion ATP/PC Energy contribution LACTIC ACID SYSTEM Main source of energy from sec Peaks in output at approx 20sec Fatigues due to build up of lactic acid Provides energy for up to 2min 10s 20s 30s 60s 2min 4min+ Time Home ©PE STUDIES REVISION SEMINARS

11 ENERGY SYSTEM INTERPLAY
Home ©PE STUDIES REVISION SEMINARS

12 ACUTE CIRCULATORY RESPONSES TO PHYSICAL ACTIVITY
SEDENTARY MALE ENDURANCE TRAINED MALE ATHLETE HEART RATE (bpm) REST MAXIMUM 70-80bpm 220-age 40-50bpm STROKE VOLUME (ml) 60-70ml ml 90-100ml ml CARDIAC OUTPUT (L) 5L 15-20L 4.5-5L 25-35L NOTE: Cardiac output in trained athletes is the same, even slightly lower during sub maximal exercise and rest due to the significantly lower heart rate Home ©PE STUDIES REVISION SEMINARS

13 OXYGEN CONSUMPTION BEFORE, DURING AND AFTER EXERCISE
OXYGEN DEBT The amount of oxygen consumed during the recovery period (recovery oxygen consumption) The size of the debt is dependant upon the exercise intensity – GREATER THE INTENSITY, GREATER THE DEBT! The debt serves to replenish energy stores utilised during exercise Replenish ATP/PC stores Remove lactic acid through the conversion of lactate → glycogen in the liver Supply active tissues such as heart and respiratory system Replace depleted oxygen stores in the body OXYGEN DEFECIT The difference between the amount of oxygen consumed and the amount of oxygen that would have been consumed if a steady state had been reached from the start Oxygen consumption Steady state 0xygen consumption due to constant exercise intensity Resting levels O2 consumed REST EXERCISE RECOVERY Exercise duration Home ©PE STUDIES REVISION SEMINARS

14 Physiological method of determining lactate threshold
LONG – TERM (CHRONIC) AEROBIC TRAINING ADAPTATIONS – PERFORMANCE CHANGES ↑ ANAEROBIC OR LACTATE THRESHOLD Represents an exercise level where the intensity increases such that lactic acid production exceeds lactic acid clearance. It is beyond this level where blood and muscle lactate levels rise quickly and muscular contractions are affected, negatively affecting performance. Trained athletes are much better able to tolerate lactic acid and can therefore continue to exercise effectively with much higher levels of lactate and hydrogen ions. Physiological method of determining lactate threshold Determinant % HR max UT – 60-65% TR – 85-90% % VO2 max UT – 55-60% TR – 75-85% Blood lactate levels UT – 3-4mmol/L TR – up to 20mmol/L ©PE STUDIES REVISION SEMINARS Home

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