Macronutrients Flashcards
Ergogenic Aid
any ingested or employed element used to improve performance (e.g., creatine monohydrate for strength training)
Supplements
dietary product used to supplement a deficiency in the diet (e.g., multi-mineral/vitamin pills)
Diet vs Nutrition
Diet- nutrient and non-nutrient intakes, consumed by the mouth
Nutrition- all physiological processes that occur once food/drink enters the body to nourish tissues
What are the stages of Nutrition?
- ) ingestion
- ) digestion
- ) absorption
- ) circulation
- ) assimilation
- ) elimination
Nutrient
any substance that provides nourishment and helps maintain bodily homeostasis
Energy-Yielding Nutrients
yield usable energy in the form of calories; includes carbohydrates, protein, and fat (alcohol is an energy yielding non-nutrient at 7 kcal/g)
Non-energy yielding Nutrients
do not contain calories, but are still essential to bodily functions; includes water, minerals and vitamins
Nutritious Diet
regularly meets all macronutrient and micronutrient demands
Macronutrient
consumed in relatively greater quantities to prevent deficiencies and maintain optimal bodily function; includes carbohydrates, protein, fat, and water
Micronutrient
consumed in relatively small quantities to prevent deficiencies and maintain optimal bodily function; includes vitamins and minerals
Primary Factors that Impact Nutrition:
- ) genetics and family history
- ) disease and medical conditions
- ) deficiencies
- ) Current and daily behaviors
- ) Activity Status
- ) Disordered Eating patterns
Eating for fitness vs sport performance
- Fitness competitors often focus on optimized nutrient timing and quantities for aesthetics or single-day events such as a 5K
- Athlete nutrition must ensure adequate energy intake to delay fatigue while providing proper nutrient density for performance, optimal recovery, and necessary bodyfat
Catabolism
metabolic activity associated with the breakdown of tissues or energy reserves within the body (e.g., storage fat loss due to high caloric expenditure)
Anabolism
metabolic activity associated with the building of tissues or storage of energy reserves within the body (e.g., protein synthesis for muscle growth)
3 Primary Goals of Sports nutrition:
- ) Provide adequate energy to support work and recovery.
- ) Ensuring nutrient balance supports cellular demands for growth, maintenance, and repair.
- ) provide adequate support for efficient metabolic and immune function
Caloric expenditure of fitness training vs competitive athletes
Fitness training can burn 1,500-2,500 kcals/week while competitive athletes may burn >1,000 kcals in a single day
When various sport athletes were compared:
- ) Mean estimated energy intake for males
- ) Mean estimated energy intake for females
- ) The highest total intakes were generally found among
- )Most common macronutrient inadequacy
- ) males ranged from 2,561-2,994 kcals/day
- ) females ranged from 1,997-2,457 kcals/day
- ) The highest total intakes were generally found among endurance athletes
- ) insufficient carbohydrates
Hyponatremia
dangerous condition associated with an abnormally-low blood sodium level (<135 mmol/L)
Phytochemicals
active compounds found in plants shown to provide health benefits, but are not essential or linked to a deficiency (e.g., lycopene in tomatoes)
Precision nutrition
integrates primary factors related to genotype/phenotype status (genetics and characteristics) with secondary factors that affect nutrition in relation to general guidelines
Daily Carbohydrate Needs for fuel and recovery Light- Moderate- High- Very High-
Light- 3-5g/kg athletes bodyweight/d
Moderate- 1h/d = 5-7g/kg/d
High- 1-3h/d = 6-10g/kg/d
Very High- 4-5h/d = 8-12g/kg/d
Describe general carbohydrate fueling up strategies
preparation for events <90 min of exercise, 7-12g/kg/24h for daily fuel needs
Describe carbohydrate loading fueling strategies
Preparation for events > 90min of sustained/intermittent exercise, 36-48 of 10-12g/kg of BW/24h
Describe carbohydrate speedy refueling
<8h recovery b/n 2 fuel demanding sessions, 1-1.2 g/kg/h for first 4h then resume daily fueling needs
Describe carbohydrate pre-event fueling
before exercise >60min, 1-4g/kg consumed 1-4h before exercise
Recommended carbohydrate intakes during exercise Brief- Sustained- Endurance- Ultra-Endurance-
Breif- <45min, not needed
Sustained- 45-75min, small amounts including mouth rinse
Endurance- 1-2.5h, 30-60g/h
Ultra Endurance- >2.5-3h, up to 90g/h
Rapidly oxidized Carbohydrates (~1 g/min)
Glucose, Sucrose, Maltose, Maltodextrins, amylopectin
Slowly Oxidized Carbohydrates (~0.6g/min)
fructose, galactose, isomaltulose, trehalose, amylose
T or F
Mixing CHOs provides the best outcome for events lasting longer than 60min
T