Exam Flashcards
In a study by Coyle et al (1986), they examined carbohydrate feeding during exercise. Briefly outline the study design, the results and implications (4 marks)
Either fed glucose every 20 min or placebo during TTE test (1 mark)
Fed condition
Maintained plasma glucose CHO oxidation (1 mark)
Similar muscle glycogen use (1 mark)
Exercised for ~ 1h longer (1 mark)
One calorie is equal to how many joules?
4.2
A 55kg female runs for 30 min at an intensity of 6.0 METS. Calculate the gross energy expenditure for this exercise bout? (2 marks)
55 x 6 x 0.5 = 165 kcal
The ‘Informed-Sport’ program provides a level quality assurance for the supplements industry by routinely screening participating manufacturer’s products for contaminants.
List the two (2) factors that might explain why supplements are found to contain substances not declared on the label
Ineffective cleaning of equipment – cross-contamination
Substances added on purpose to improve the perception of the product
How does the maximal rate of fructose oxidation compare to glycose ?
Its is oxidized at half the amount.
Glucose 60g/h
Fructose 30g/h
A successful male 5000 m and 10000 m track athlete (height 1.65m, body mass 58kg) plans to change their training focus with a view to completing a first marathon in 6 months’ time.
Describe how training volume and intensity might change (1 mark)
What would be the general recommendations for dietary carbohydrate intake? (1 mark)
Describe the recommended carbohydrate intake in the days before, the morning of the race and during the race (3 marks)
Volume will increase, intensity will decrease
at least 7-10 g/kg BM/d carbohydrate
CHO loading in the days before
High CHO (1-4g/kg BM) meal 1-4 hours before
60g/h CHO during the race
Which of the following is involved with fatty acid transport into the mitochondria?
Creatine
Creatinine
Carnitine
Carnosine
Carnitine
What are the protein guidelines per day for a strength athlete? (1 mark)
Is Danny meeting them (he weighs 85kg)? (1 mark)
1.2-1.7 g/kg/d
yes
What is the percentage that the thermic effect of feeding contributes to daily energy requirements?
10%
Which of the following can be due to over consumption of water ?
Hypernatremia - High sodium
Hyperosmolality
Reduced blood pressure
Hyponatremia - Low sodium
Hyponatremia
What does leucine simulate ?
MTOR
Provide two examples of when structured rehydration is required?
Two from four
Exercise bouts in close proximity (max 2 marks)
Athletes training more than once a day (1 mark)
Weight category athletes after making weight (1 mark)
Where water losses are high (>3% body mass) (1 mark)
If athlete is hypohydrated and shows symptoms of heat illness (1 mark)
What is the concentration of sodium in intracellular fluid in heathy individuals ?
10mmol/l
How does resistance exercise affect muscle protein synthesis and breakdown ?
It increases both.
At what level of urine osmolality does dehydration become indicated ?
900 mOsmols/kg
