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Copy of Energy intake and expenditure in sports
Transcript of Copy of Energy intake and expenditure in sports
BTEC Level 3 Energy Expenditure in Sports performance
1 Kcal = 4.2 kjoules Energy intake is measured by calories &
A calorie is equal to the sum of heat
or energy required to raise the temperature
by one litre of water by one degree.
Calories are also termed kilo calories Durnin and Wormsley skin fold analysis Measurement of body stores of energy To know the energy intake and expenditure in sports. Aim 1g of Carbohydrate = 4 kcals
1g of protein = 4 kcals
1g of fat = 9 kcals Objective
By the end of the lesson you will be able to:
Calculate your BMR
Calculate your basal metabolic rate
Complete a 24 hour food diary
Research the calories in the food
Calculate your energy intake and energy expenditure
This involves placing electrodes on the foot and passing a small electrical current through the body.
What are the benefits of this?
This method is based on archimedes principle and involves being weighed under water.If the weight of the water displaced is less than the weight of the object, the object will sink.
Otherwise the object will float, with the weight of the water displaced equal to the weight of the object
Can you state the advantages of this method?
Who do you think will weigh the most in water?
A muscular person
A person with large amounts of bone mass
A person with large amounts of body fat Other body stores of energy measurements. The (BMR) is the minimum amount of calories required to sustain function. The BMR is affected by :
Thyroxin- from the thyroid hormone. Energy Intake The Basal Metabolic rate Males : BMR = kg (Body Weight) *24 = kcal/day.
Females: BMR = 655 + 9.6 * (Body Weight) * 23 = kcal/day.
Harris Benedict Method
BMR = 66 + (13.7 * weight in kilograms) = 5 * HT in cm - (11.8 * age). The BMR estimate calulations Facts! Fat contains the highest levels of energy.
Direct caloriemetry involves measuring heat production of an athlete.
Body fat is measured by skin folds.
Basal metabolic rate is affected by age, size, body composition, fasting and thyroxine. Summary Complete the case study in groups of four or five.
Prepare a five minute presentation in your groups.
Present and justify your findings Task