anaerobic and aerobic phase

ANAEROBIC PHASE

Action utilize oxygen already in the body , and the higher power output cannot last more than about time.

Anaerobic phase becauase no ingestion of oxygen is required.

AEROBIC PHASE

The body quickly becomes oxygen deficient during the anaerobic phase and requires oxygen from the lungs to maintain its activity.

Examples of mild to moderate aerobic activities:

Take a short walk around the block Rake leaves Play actively with the kids Walk up the stairs instead of taking the

elevator Mow the lawn Take an activity break--get up and stretch

or walk around Park your car a little farther away from

your destination

Examples of higher intensity aerobic activities:

Brisk walking Jogging Bicycling Swimming Aerobic dancing Racket sports Rowing Ice or roller-skating Cross-country or downhill skiing Using aerobic equipment (i.e., treadmill,

stationary bike)

Actions that initiate the anaerobic phase are e accommpanied by other actions that make possible the long-term production of energy in the aerobic phase.

These include:

Sweat production to dissipate thermal energy.

Rapid breathing. Dilation of air passageways.

EXAMPLE

Compare the amount of oxygen consumed in 1 hour by a cyclist traveling at 21 km/hr with that used by a person sleeping .What would you expect the ratio of the respiratory rates to be in these two activites?

SOLUTION

Rate of oxygen (O2) consumption when cycling Lo2 =( 2.0 liters O2/min)(60 min) = 120 liters O2 cycling And for sleeping Lo2 = (0.24 liter O2/ min)(60min) = 14 .4 liters O2 sleeping The ratio is 120 liters O2 =8.33 14.4 liters O2

Raquel Jane M. SaysonBEED-Generalist