8.3.3
Hydration
Hydration
Hydration
Water makes up most of the human body (about 70%) and helps with chemical reactions in the body, such as lubrication (body processes running smoothly) and thermoregulation (maintaining body temperature). Therefore, it’s vital that we stay hydrated. The factors affecting hydration are:
Environment
Environment
- Depending on where we are, the amount of water we need can change.
- E.g. in a desert we will need to drink more water to help keep us cool.
Temperature
Temperature
- The hotter we are, the more we will sweat and the more water we will lose. We need to drink more water to replace the water lost in sweat.
Exercise
Exercise
- If we exercise, we are more likely to lose water (by sweating), which we will need to replace.
Dehydration
Dehydration
If we do not keep the water balance in our body, we can become dehydrated (lose too much water). Dehydration can lead to:
Thickening of the blood
Thickening of the blood
- This means that water is lost from the blood, so the blood becomes thicker.
- This reduces blood flow.
Increased heart rate
Increased heart rate
- Thicker blood means the heart has to work harder and beat more to maintain the blood supply to the body.
- This can cause an irregular heartbeat.
Longer reaction time
Longer reaction time
- This means that it takes longer to respond to a stimulus.
- Increased reaction time can result in a decrease in performance.
Fatigue
Fatigue
- Muscles can cramp and fatigue will happen more quickly because of water loss.
- This is because waste products cannot be removed as quickly as usual.
Increased body temperature
Increased body temperature
- The body can also begin to overheat as there is less water to cool the body down
1Applied Anatomy & Physiology
1.1The Musculoskeletal System
1.2The Cardio-Respiratory System
1.2.1Pathway of Air
1.2.2Blood Vessels
1.2.3Blood Vessels 2
1.2.4Structure of the Heart
1.2.5Cardiac Cycle
1.2.6Measures of Heart Performance
1.2.7The Mechanics of Breathing
1.2.8The Mechanics of Breathing 2
1.2.9The Lungs
1.2.10End of Topic Test - The Cardio-Respiratory System
1.2.11Exam-Style Questions - Cardio-Respiratory System
1.3Anaerobic & Aerobic Exercise
1.4Short-Term Effects of Exercise
2Movement Analysis
3Physical Training
3.1Health & Fitness
3.2The Components of Fitness
3.2.1The Components of Fitness
3.2.2Sports & Fitness
3.2.3Fitness Testing
3.2.4Measuring Agility & Balance
3.2.5Measuring Cardiovascular & Coordination
3.2.6Measuring Endurance & Power
3.2.7Measuring Reaction Time & Strength
3.2.8Measuring Strength, Speed & Flexibility
3.2.9End of Topic Test - The Components of Fitness
3.2.10Exam-Style Questions - Fitness Tests
4The Principles of Training
4.1Principles of Training
5Using Data
5.1Types of Data
5.2Data Presentation & Analysis
6Sports Psychology
6.2Feedback & Preparation
7Socio-cultural Influences
7.1Engagement Patterns of Different Social Groups
7.2Commercialisation
7.3Ethical & Socio-cultural Issues
7.3.1Impact of Technology on Performers
7.3.2Impact of Technology on Performers 2
7.3.3Impact of Technology on Sport
7.3.4Impact of Technology on Sport 2
7.3.5Sporting Conduct & Banned Substances
7.3.6Blood Doping
7.3.7Drug Restrictions
7.3.8Drug Restrictions 2
7.3.9Spectator Behaviour
7.3.10End of Topic Test - Ethical Issues
7.3.11Exam-Style Questions - Performance Enhancing Drugs
8Health & Fitness
8.1Overview of Health
8.2Sedentary Lifestyles
Jump to other topics
1Applied Anatomy & Physiology
1.1The Musculoskeletal System
1.2The Cardio-Respiratory System
1.2.1Pathway of Air
1.2.2Blood Vessels
1.2.3Blood Vessels 2
1.2.4Structure of the Heart
1.2.5Cardiac Cycle
1.2.6Measures of Heart Performance
1.2.7The Mechanics of Breathing
1.2.8The Mechanics of Breathing 2
1.2.9The Lungs
1.2.10End of Topic Test - The Cardio-Respiratory System
1.2.11Exam-Style Questions - Cardio-Respiratory System
1.3Anaerobic & Aerobic Exercise
1.4Short-Term Effects of Exercise
2Movement Analysis
3Physical Training
3.1Health & Fitness
3.2The Components of Fitness
3.2.1The Components of Fitness
3.2.2Sports & Fitness
3.2.3Fitness Testing
3.2.4Measuring Agility & Balance
3.2.5Measuring Cardiovascular & Coordination
3.2.6Measuring Endurance & Power
3.2.7Measuring Reaction Time & Strength
3.2.8Measuring Strength, Speed & Flexibility
3.2.9End of Topic Test - The Components of Fitness
3.2.10Exam-Style Questions - Fitness Tests
4The Principles of Training
4.1Principles of Training
5Using Data
5.1Types of Data
5.2Data Presentation & Analysis
6Sports Psychology
6.2Feedback & Preparation
7Socio-cultural Influences
7.1Engagement Patterns of Different Social Groups
7.2Commercialisation
7.3Ethical & Socio-cultural Issues
7.3.1Impact of Technology on Performers
7.3.2Impact of Technology on Performers 2
7.3.3Impact of Technology on Sport
7.3.4Impact of Technology on Sport 2
7.3.5Sporting Conduct & Banned Substances
7.3.6Blood Doping
7.3.7Drug Restrictions
7.3.8Drug Restrictions 2
7.3.9Spectator Behaviour
7.3.10End of Topic Test - Ethical Issues
7.3.11Exam-Style Questions - Performance Enhancing Drugs
8Health & Fitness
8.1Overview of Health
8.2Sedentary Lifestyles
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