BTEC LEVEL 2 SPORT
UNIT 4 – THE SPORTS
PERFORMER IN ACTION
Task 1 – Short Term Effects of Exercise
D Nicholls
OBJECTIVES

To identify the short term effects of exercise on
the human body.
INTRODUCTION.


Think about what happens when you exercise…
What happens when you first exercise? How long
does it last? Why does this happen?
BODY SYSTEMS…

Musculoskeletal

Cardiorespiratory
What impacts
happen on each?
SHORT TERM - MUSCULOSKELETAL





Increased production of synovial
fluid for joint lubrication and
nourishment
Increased joint range of
movement due to increase in
blood flow and increased muscle
temperature
Micro tears in muscle fibres,
causing the muscle to rebuild
itself and become slightly bigger
and stronger
Exercise (high-impact activity)
encourages new bone formation
Increased metabolic activity.
You need to explain
each one in relation to
short term exercise.
Make sure you are
clear!!!
What examples can
you come up with?
SHORT TERM – CARDIORESPIRATORY (1)
Increased heart rate due to the heart having to work
harder to pump oxygenated blood around the body
 Increased breathing rate, in order to supply more
oxygen to working muscles and remove carbon
dioxide
 Increased blood flow
 Sweat production and skin reddening
 Re-distribution of blood flow via the vasoconstriction
(narrowing) of arterioles supplying inactive parts of
the body and vasodilation (opening) of arterioles
supplying skeletal muscles with more blood and
nutrients
 Increased build-up of lactic acid in the blood

SHORT TERM – CARDIORESPIRATORY (2)
Increased cardiac output to get oxygenated blood
to working muscles (due to
 Increased heart rate and stroke volume)
 Increased blood pressure – as the cardiovascular
system works to deliver more oxygen and glucose
to the muscles (systolic pressure rises and
diastolic pressure remains unchanged)
 As muscular activity increases, the production of
carbon dioxide increases resulting in an increase
in Tidal Volume (TV) (TV is the amount of air
inhaled and exhaled with each breath).

YOUR TASK…

You need to explain HOW
exercise effects the body
systems, and WHY.
Make sure you offer up clear
explanations.
 Make sure you use examples
where possible to illustrate
your points.
 Use diagrams or images to
back up your statements
where possible.
 Make sure your explanation
demonstrates your
understanding!
