KINE 2P20 Lecture Notes - Lecture 3: Carbohydrate, Lactase, Sucrose
9 May 2018
School
Department
Course
Professor
Nutrition 2P20
CHPT 13
Aerobic Metabolism: metabolism in the presence of oxygen
Anaerobic Metabolism: metabolism in the absence of oxygen
- Each molecule of Glucose produces 2 molecules of ATP
- When O2 supply is not fast enough to working muscles
Instant Energy – stored ATP and PCr
- 10-15 sec of sustained energy
Short-term Energy – Anaerobic Metabolism
- cytosol, glycolysis, glucose only
- production of lactic acid
- minutes of intense activity
Long-term Energy – aerobic Metabolism
- mitochondria, glucose, fat, AA
- beta-oxidation of fats
- protein – small amounts
Eerg Need for Eerise…
- <50% VO2max, FAT is predominant fuel
- as intensity increases, CHO is predominant fuel
- >85%, no FAT use, BG more important
- FAT does’t get ou ATP fast eough
Nutrients Providing Energy
CHO
- Main fuel source for contracting muscles and brain
- Glucose stored as glycogen in liver and muscle
- Glucose circulating in blood
PRO
- 5-20%of fuel source
- energy and gluconeogenesis
- AFTER exercise, repair and rebuild
FAT
- Most concentrated source of energy
- Most abundant
- Fuel for slow and continuous exercise (beta-oxidation takes time)
ALL fuel is used to make ATP (cellular respiration)
- CHO – glycolysis and krebs
- PRO – krebs
- FAT – krebs (beta oxidation)
Vitais ad Mierals for Eerise…
- B-vitamins: help with production of ATP from fuels
- Antioxidant Vitamins (C&E): neutralize free radicals and minimize oxidative damage
find more resources at oneclass.com
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Document Summary
Aerobic metabolism: metabolism in the presence of oxygen. Anaerobic metabolism: metabolism in the absence of oxygen. Each molecule of glucose produces 2 molecules of atp. When o2 supply is not fast enough to working muscles. Short-term energy anaerobic metabolism cytosol, glycolysis, glucose only. As intensity increases, cho is predominant fuel. >85%, no fat use, bg more important. Fat does(cid:374)"t get (cid:455)ou atp fast e(cid:374)ough. Main fuel source for contracting muscles and brain. Glucose stored as glycogen in liver and muscle. Fuel for slow and continuous exercise (beta-oxidation takes time) All fuel is used to make atp (cellular respiration) B-vitamins: help with production of atp from fuels. Antioxidant vitamins (c&e): neutralize free radicals and minimize oxidative damage. Iron: prevent anemia and promote hemoglobin levels, most important for vegetarian athletes. Calcium: improve bone health and prevent reductions in bmd. Dehydration water loss is great enough to cause drop in blood volume (2-3% of body weight loss, deleterious effects)
