Vasomotor Control Centre

Controls Vascular Shunt Mechanism

Located the Medulla Oblongata

Stimulates the sympathetic nervous system

This then either vasodilates or vasoconstricts arterioles and pre-cappillary spinctres supplying muscles and organs

Gets information from:
Chemoreceptors - in muscles, aorta and carotid arteries
These tell Mr VCC that lactic acid and C02 levels are too damn high - pH is too low! The acid has kicked in

Baroreceptors - in aorta and carotid arteries
informs Mr VCC that systolic BP has increased/decreased

Warm ups and Cool Downs effect on Vascular System

Explain the effects of a warm up on the vascular system.

 "A warm up means you won't pull a muscle as easily" - guaranteed Dobson will put this (don't be a mong!)

Warm up:

Vasoconstriction of arterioles/pre-capillary sphincters to non-essential organs and non-working muscles

Means more blood flow to working muscles

Vasodilation of arterioles/pre-capillary sphincters to working muscles

Means more blood flow to muscles that need it

Increased body/muscle temp:

 - increased enzyme activity/transport of ones required for energy systems and muscle contractions

- decreased blood viscosity, improves blood flow

Decrease in OBLA (onset of blood lactate accumulation) due to early onset of anaerobic work when a warm up isn't done

Cool Down:

Keeps metabolic activity elevated which gradually decreases HR and respiration - do it steady not suddenly basically

Maintains respiratory/muscle pumps - no more blood pooling! Maintains venous return

Maintains blood flow and BP

Keeps capillaries dilated, more lactic acid and C02 getting removed - no one likes lactic acid, get rid of it!

Heart Diseases

4 things you need to remember about:

Numero uno: Arteriosclerosis
Loss of elasticity or thickening/hardening of arteries
Less efficient at vasodilation/constriction
Vascular shunt mechanism then = less efficient

Numero dos: Atherosclerosis
High levels of cholesterol and fat deposits
these accumulate in arterial walls-narrowing of the "lumen"
increased likelihood of blood clots and restricts blood flow
BP is increased because of smaller room to flow through

Numero tres: Angina
Partial blockage of coronary artery
Causes intense chest pain - not enough 02/blood supply to heart muscle wall
athero/arteriosclerosis increases chance of this happening

Numero cuatro: Heart Attack
Severe/sudden lack of 02/blood supply to heart muscle wall
blood clots from larger coronary arteries
death of damaged area heart muscle wall
less efficient heart after

Lessen the risk!!

Hypertrophy
Less blood fibrinogen - reduces clotting and viscosity
Less blood lipids
Less LDL - deposited onto arterial walls
More HDL - act as scavengers for cholesterol
Lower BP - less hypertension, helps
Less obesity - don't get fat kids
Less stress - Watson will testify to this when Birdy gets his A

Schema Theory

4 Memory Items  :

1) Knowledge of Initial Conditions
Whether the performer has been in this situation before / previously experienced a similar situation

2) Knowledge and Response Specifications
Knowledge of what to do in these situations

Memory items 1 and 2 = Recall Schema

3) Knowledge of Sensory Circumstances
Kinaesthesis / how the skill should feeling eg how hard to pass a ball in rugby to get to the team mate

4) Knowledge of Movement Outcome
Knowing what the result of the skill should be - successful or not?

Memory items 3 and 4 = Recognition Schema

Sports Development Pyramid

Foundation:

Children being introduced into sport
Learning basic skills
Positive attitudes

Participation:

School/clubs
NON-COMPETITIVE
enjoyment, health, fitness, FUN
recreational

Performance:

formal school/club
competitive
skilled, committed performers - regular training etc
district/county as well

Excellence:

Highly skilled/elite athletes
high levels of coaching
sport science support
fully committed performers - its their job
Get paid for it maybe

PESSCL

8 Different Strands:
2007 - PM pledged 100m to this strategy - did it work?

2 hours in school, 2 hours+ outside of school for every child.
fitter Britain, greater sporting nation
more competition

1) Sports Colleges

2)School sports programmes

3)Gifted and Talented

4)Sporting playgrounds

5)Club Links

6)Step into Sport

7)Swimming

8)Professional Development

UK Sport, National Institutes of Sport and Home Country Organisations

UK Sport:

All about sporting excellence - responsible for developing elite sport in the UK.
Funded by department for media, culture and sport. Received £53 million from government in 2006-7, will have increased a lot by now.

Distributes funding throughout the world class pathway programme, attracts major events, works with home country councils and NGB's.
Responsible for national institutes of sport.
Talented athlete Scholarship scheme

National Institutes of Sport:

A network of satellite centres giving practical support to the UK's top sportsmen and women.
One for each country in the UK
Sport science, sports medicine, physiotherapy, bio mechanics, nutritional advice, psychology, lifestyle advice

Home Country Organisations:

Sport England:
Responsible for community sport in the country, funded by government and national lottery.
MASS PARTICIPATION
Wants to get as many people active as it can
Ensure people stay in sport after leaving school
Promotes volunteering, coaching, leadership etc
Works closely with NGB's