PHYSCI 5 Lecture Notes - Lecture 8: Lactate Threshold, Blood Vessel, Vo2 Max

• School: UCLA
• Department: Physiological Science
• Course: PHYSCI 5
• Professor: Esdin, J.

Document Summary

Oxygen goes into the lungs (respiratory), then delivered to the muscles (cardiovascular), then use oxygen for atp (muscles) Vo2 max - the maximum capacity our body has to transport and utilize oxygen during exercise. Training can increase your vo2 max (delays fatigue, will take longer to reach vo2 max) At low intensity fat is used, as intensity increases carbohydrate usage increases. The more you exercise, the more all 3 of these factors will increase. Cardiac output = heart rate x stroke volume. Shorter time reaching hrmax longer time. Our body diverts blood flow to prioritize body parts in use. Muscles get much more blood during exercise. Hemoglobin in the blood vessel and mitochondria in the muscle cells increase. There is an emphasis on type i muscle cells. Muscle cells are converted from type iix to type iia. Lactate threshold is the point where we start to fatigue.