Soc 19 : Short Term Effects Of Exercise

Question 1

Effects on the muscles

Answer 1

Muscle fatigue is when you exercise, your muscles can feel weak, painful and tired
This occurs as a result of anaerobic respiration.
If there is no oxygen available for respirstion we produce lactid acid, this process is known as lactate accumation.
Cramps occur because of this.

Question 2

Effects on the heart

Answer 2

Stroke volume is the amount of blood pumped by the heart during each beat. This will increase during physical activity as the muscles will require more blood
• When someone trains regular, their heart increases in size, thickness and strength and so the stroke volume increases
Therefore the heart rate decreases. This enables athletes to peform at a high intensity.

Question 3

Effects on the heart

Answer 3

Cardiac output is the amount of blood pumped by the heart in one min
• Cardiac output = stroke volume x heart rate
• The higher your cardiac output, the better your physical performance
• Your body holds around 6 litres of blood and all the blood can pass through the heart in one minute

Question 4

Effects on respiritory system

Answer 4

When you exercise you need to bring in more oxygen and get rid of more carbon dioxide
• Therefore as you exercise the depth and rate of your breathing increases
• When you exercise hard, you use up more oxygen than you take in. This shortfall creates oxygen debt