Mod 6: energy systems

Question 1

ATP/PC source of fuel

Answer 1

ATP already found in body’s cells and then Creatine Phosphate stores

Question 2

Anaerobic (lactic acid) source of fuel.

Answer 2

Glucose: stored in blood, liver or muscle.

Glycogen comes from carbohydrates

Question 3

Aerobic source of fuel.

Answer 3

Glucose: muscles or liver
Once depleted…
Fatty acid: fat tissue (1hr)
Amino acids: proteins (starvation mode)

Glucose is preferred.

Question 4

How are energy systems interchanging?

Answer 4

no energy system works in isolation, the dominant system interchanging depending on the duration and intensity of the activity

eg. in a soccer game : dominant depends on
- SPECIFIC MOVEMENTS/SKILLS PERFORMED
- FREQUENCEY OF SUBBING
- INTENSITY OF GAME

Question 5

Duration of lactic acid system

Answer 5

high intensities of 70%-90% mHR exceeding 3 minutes, this waste will accumulate muscle cells, causing fatigue and preventing contractions

Question 6

Duration of ATP PC system

Answer 6

5-8 seconds.

Afte 10 seconds of maximal work - supply is depleted

Question 7

Duration lactic acid system

Answer 7

10 seconds - 3 minutes

80-95 % heart rate.

Question 8

Duration of aerobic system

Answer 8

glycogen stores: 12 hrs rest, 1 hour intense exercise.

Virtually unlimited fat supplies.

60-80% of max heart rate.

Question 9

ATP PC cause of fatigue.

Answer 9

Inability for the system to continually resynthesis ATP as PC stores are exhausted.

Question 10

lactic acid cause of fatigue

Answer 10

lactic acid accumulates in the muscles.
Rate of removal, not its presence.

Causes athlete to decrease intensity or stop.

Prevent muscles from contracting.

Question 11

Aerobic cause of fatigue.

Answer 11

Depletion of glucose stores.
Is versitiale and switches fuel systems.

Poor respiration and or circulation may cause poor removal of wastes, causing fatigue.

Switching from glycogen to fat may cause momentary fatigue.

Question 12

Waste products of aerobic

Answer 12

carbon dioxide & water

Question 13

Rate of recovery ATP PC

Answer 13

2 minutes.

Question 14

Rate of recovery lactic acid

Answer 14

To fully remove 30 minutes or up tp 2 hours.

• active recovery speeds this up.
• Reconverted to glycogen in the liver to be used as the main source of fuel.

Question 15

Rate of aerobic recovery

Answer 15

Depends on activity taking place.

If glycogen stores have not been depleted, it offers quick recovery.

Exhausted glycogen systems may take a couple of days.

Replenishment of lost glucose and glycogen (eat)