chronic adaptations to training Flashcards
3 types of aerobic training adaptations
- Cardiovascular
- respiratory
- muscular
resistance training adaptations
neuromuscular
3 types of chronic adaptations to training
aerobic, anaerobic, resistance
Aerobic cardiovascular
- faster heart rate recovery rate
- increased capillarisation of the heart muscle
-increased stroke volume of the heart - increased left ventricle size and volume ( cardiac hypertrophy)
- decreased resting and submaximal hart rate and faster recovery heart rate
Aerobic respiratory training adaptations
- pulmonary ventilation
- tidal volume
- respiratory rate
- pulmonary diffusion
aerobic training adaptations - muscular
- muscle structures
- increased myoglobin
-increased mitochondria size, number and density - oxidative enzymes
- oxidation of fat
- glycogen sparing
- glycogen stores
increased cardiac hyprtrophy (cardiovascular adaptations - aerobic training )
- an increase in the size of the left ventricular cavity leads to an increase in stroke volume and a slight thickening of the ventricular walls
- heart experiences hypertrophy due to aerobic training
Heart rate - (cardiovascular adaptations - aerobic training )
- lower resting hearts rate ( due to increased stroke volume)
- lower heart rate response at submaximal workloads
- no real change of heart rate at maximal workloads
- slower heart rate increase during exercise
- lower and faster steady state
decreased recovery heart rate following sub max exercise - decreased recovery heart rate following maximal exercise
increased capillarisation of heart muscle -(cardiovascular adaptations - aerobic training )
- increased capillary density improves blood flow to the heart
- The heart maintains a very high level of oxygen extraction so that 70-80% of the arterially delivered oxygen is extracted, compared with 30-40% in skeletal muscle - O2 delivered to the heart is essentially used for contraction
Stroke volume -(cardiovascular adaptations - aerobic training )
- volume of blood ejected from the left ventricle per beat of the heart
- most pronounced in endurance atheltes
- the increase in stroke volume is attributed to:
+ increased left ventricular cavity size
+ increase myocardial contractility ( force of the contraction of the left ventricle concentration)
Cardiac output - (cardiovascular adaptations - aerobic training )
- volume of blood pumped by the heart per minute
Q= SV x HR - average adult contains 5L blood so all blood is pumped through the heart about once every minute
For aerobic training:
- q is unchanged or has slight decrease at rest
- Q is unchanged or has slight decrease at sub - Max exercise
- Q increased at maximal exercise
Blood pressure - (cardiovascular adaptations - aerobic training )
Systolic - pressure on the arteries following CONTRACTION of the ventricles as blood is pumed out of the heart
DIASTOLIC - pressure in the arteries when the heart RELAXES and the ventricle fills with blood
Aerobic trainings influences
+ decreased BP at rest
+ Decreased BP at submax level
+ unchanged BP at max levels
- greatest changes occur in systolic blood pressure which decreases due to:
= increased vasodilation of blood vessels - less peripheral resistance to blood pressure - decreased concentration of total cholesterol
Blood vessels - (cardiovascular adaptations - aerobic training )
- Aerobic training increases the size of blood vessels ( arteries and capillaries) transporting O2 to the heart
- results in improves blood supply to the heart and therefore improved O2 supply to the heart
- leads to increased capillarisation at the skeletal muscles
increased plasma and haemoglobin - (cardiovascular adaptations - aerobic training )
- total blood volume and haemoglobin increase with aerobic training
- improves O2 carrying capacity of the blood and is closely correlated with max VO2
- increased blood volume assist temp control during exercise particulary in hot temps
oxygen extraction - aVO2 diff - (cardiovascular adaptations - aerobic training )
- differences in oxygen content between the arterial and mixed venous blood. Represents the amount of O2 extracted or consumed by the tissues
Aerobic training –> larger avo2diff
- redistribution of blood flow to active muscles
- greater extraction of o2 by the working muscles as a result of increased mitochondria numbers, more oxidative enzymes and increased levels of myoglobin