8.3.3
Hydration
Test your knowledge with free interactive questions on Seneca — used by over 10 million students.
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
- 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
- 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
- If we exercise, we are more likely to lose water (by sweating), which we will need to replace.
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
- This means that water is lost from the blood, so the blood becomes thicker.
- This reduces blood flow.
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
- This means that it takes longer to respond to a stimulus.
- Increased reaction time can result in a decrease in performance.
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
- 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 Air1.2.2Blood Vessels1.2.3Blood Vessels 21.2.4Structure of the Heart1.2.5Cardiac Cycle1.2.6Measures of Heart Performance1.2.7The Mechanics of Breathing1.2.8The Mechanics of Breathing 21.2.9The Lungs1.2.10End of Topic Test - The Cardio-Respiratory System1.2.11Exam-Style Questions - Cardio-Respiratory System1.2.12Diagnostic Misconceptions - Pathway of Blood1.2.13Diagnostic Misconceptions - Cardiac Output
1.3Anaerobic & Aerobic Exercise
1.4Short-Term Effects of Exercise
2Movement Analysis
2.1Lever Systems
3Physical Training
3.1Health & Fitness
3.2The Components of Fitness
3.2.1The Components of Fitness3.2.2Sports & Fitness3.2.3Fitness Testing3.2.4Measuring Agility & Balance3.2.5Measuring Cardiovascular & Coordination3.2.6Measuring Endurance & Power3.2.7Measuring Reaction Time & Strength3.2.8Measuring Strength, Speed & Flexibility3.2.9End of Topic Test - The Components of Fitness3.2.10Exam-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 Performers7.3.2Impact of Technology on Performers 27.3.3Impact of Technology on Sport7.3.4Impact of Technology on Sport 27.3.5Sporting Conduct & Banned Substances7.3.6Blood Doping7.3.7Drug Restrictions7.3.8Drug Restrictions 27.3.9Spectator Behaviour7.3.10End of Topic Test - Ethical Issues7.3.11Exam-Style Questions - Performance Enhancing Drugs7.3.12Diagnostic Misconceptions - Conduct in Sport
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 Air1.2.2Blood Vessels1.2.3Blood Vessels 21.2.4Structure of the Heart1.2.5Cardiac Cycle1.2.6Measures of Heart Performance1.2.7The Mechanics of Breathing1.2.8The Mechanics of Breathing 21.2.9The Lungs1.2.10End of Topic Test - The Cardio-Respiratory System1.2.11Exam-Style Questions - Cardio-Respiratory System1.2.12Diagnostic Misconceptions - Pathway of Blood1.2.13Diagnostic Misconceptions - Cardiac Output
1.3Anaerobic & Aerobic Exercise
1.4Short-Term Effects of Exercise
2Movement Analysis
2.1Lever Systems
3Physical Training
3.1Health & Fitness
3.2The Components of Fitness
3.2.1The Components of Fitness3.2.2Sports & Fitness3.2.3Fitness Testing3.2.4Measuring Agility & Balance3.2.5Measuring Cardiovascular & Coordination3.2.6Measuring Endurance & Power3.2.7Measuring Reaction Time & Strength3.2.8Measuring Strength, Speed & Flexibility3.2.9End of Topic Test - The Components of Fitness3.2.10Exam-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 Performers7.3.2Impact of Technology on Performers 27.3.3Impact of Technology on Sport7.3.4Impact of Technology on Sport 27.3.5Sporting Conduct & Banned Substances7.3.6Blood Doping7.3.7Drug Restrictions7.3.8Drug Restrictions 27.3.9Spectator Behaviour7.3.10End of Topic Test - Ethical Issues7.3.11Exam-Style Questions - Performance Enhancing Drugs7.3.12Diagnostic Misconceptions - Conduct in Sport
8Health & Fitness
8.1Overview of Health
8.2Sedentary Lifestyles
Practice questions on Hydration
Can you answer these? Test yourself with free interactive practice on Seneca — used by over 10 million students.
- 1Which of the following is not a factor affecting hydration?Multiple choice
- 2What % of the human body is water?Multiple choice
- 3What chemical reactions does water help with in the body?Fill in the list
- 4Consequences of dehydrationTrue / false
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