Download Reasons for maintaining water balance

Starter – Match Definitions
Dehydration
Hydration
Consuming water to restore hydration.
Excessive loss of body water interrupting the
function of the body.
Rehydration
Having enough water (water balance) to
enable normal functioning of the body.
Reasons for maintaining
water balance (Hydration)
Health, fitness and well-being
Learning Objectives
• Define hydration, dehydration and rehydration (4-5)
• Explain the consequences of dehydration (6-7)
• Justify why remaining hydrated is important for a sportsperson in an
activity of your choice (8-9)
Group Task
Discuss how often you see elite performers, in different sporting events
and activities, taking in water.
In which events is this most likely to happen?
Factors that impact water consumption
• Environment
• Temperature
• Amount of exercise/activity – need to replace water
(rehydration)
Effects of Dehydration
• Blood thickens (increased viscosity), which slows blood flow
• Increases heart rate/heart has to work harder. This can cause
irregular heart rate
• Increase in body temperature/overheat
• Slower reaction time/poorer decision making
• Muscle fatigue/cramps
TH – Thickens (blood)
Temperature Increases
https://www.youtube.com/watch?v=ot2oaoi_AZo&safe=true
Dehydration = THRST (no I)
RS – Reaction Slows
T – temperature
Practice it!
Exam questions
1. Briefly explain the importance of carbohydrates and protein to
an elite sports performer.
(i) Carbohydrates
(2)
............................................................................................................
............................................................................................................
(ii) Protein
(2)
............................................................................................................
............................................................................................................
Practice it!
Marks Scheme:
1. (i) A linked explanation, e.g. Carbohydrates
provide energy (1) so quality of performance
remains high/optimum performance (1)
Carbohydrates provide energy (1) so they can last
longer in their game/race/event. Carbohydrates
provide energy (1) so they can maintain/continue
activity level in game/race/event without tiring.
(ii) Protein is used for growth/ increased muscle
mass/bigger muscles (1) so
stronger/powerful/faster for their event (1) Repair
of tissue/muscle (1) to recover from
injury/quicker recovery (1)
Practice it!
Exam questions
2. Summarise the effects of dehydration on the body.
(3)
Practice it!
Marks Scheme:
2.
-Blood thickens (increased viscosity), which
slows blood flow
-Increases heart rate/heart has to work
harder. This can cause irregular heart rate
-Increase in body temperature/overheat
-Slower reaction time/poorer decision making
-Muscle fatigue/cramps
Practice it!
Exam questions
3. A group of amateur runners are attempting their first marathon.
Some of the runners take advantage of the drinks offered to them
during the race whilst others do not.
Evaluate the actions of the runners who do not take advantage of
the drinks available.
(3)
- Stick into book then BOX, LINE, CIRCLE
- What does evaluate mean?
- State what the negative effects are, then use a connective to
explain how this would affect their performance
EG Muscle fatigue is more likely to occur in their legs which
could cause cramps. This may mean they are unable to
carry on or it may slow them down. (1)
Practice it!
Marks Scheme:
3.
More likely to suffer from increases in heart rate so the heart has to work
harder to supply oxygen to the muscles when running/ this would slow them
down (1)
Reduction in blood flow to working muscles / thicker (viscous blood) which
means less oxygen to the muscles / this would result in a slower pace(1)
Increase in body temperature so body could overheat during the race and
become faint / pass out and cannot carry on (1)
Muscle fatigue more likely which could cause cramps so cannot carry on (1)
Can cause slower reaction time/poorer decision making / slower to react if
someone takes over you in a race (1)