Units calculation review and practice problems

1. What is important about metric - easier to convert because of base 10’s

2. Name SI units for:

   1. Mass = kg

   2. Distance = m

   3. Time = seconds

   4. Force = N

   5. Work = Joules

   6. Energy = Joules

   7. Power = Watts

3. How do we define work - Force x Distance

4. How do we define Power - Work/Distance

5. How do we figure out the total work and power of a treadmill walking and running - we need incline we can’t calculate when its flat

6. What is inline - distance traveled up in the air (measures fertile distance traveled when treadmill belt is horizontal)

7. What is treadmill expressed in - Percent Grade

8. What does 10% Grade means - 10 meter rise for every 100 meters the belt moves

9. Why are SI units important - it is a constant universal scientific communication of measurement

10. 60 kg subject is running on a treadmill at 7mph at a 7.5% grade for 10 min. 1mph =26.8223 m/min

    1. Vertical displacement = %grade x distance

    

11. 1.6 m long treadmill belt rises 16 cm in the air when its inclined, the subject walks at 80 m/min and weighs 80kg, they exercise for 10 min.

    1. Find total work done in kJ and total amount of kcals

12. What does it mean “measuring energy expenditure” - measuring heat loss or amount of energy the body uses for various functions

13. Why would this be practically applicable to us as exercise scientists when we study? - for weight loss and how many calories we are expending in a workout

14. What is a calorie - equals the amount of heat required to rise the temperature of one gram of water by one degree Celsius

15. What is Calorie - big C calorie is 1,000 times bigger than small c calorie

16. What is metabolic rate - measurement of heat production as an indication of metabolic rate

17. Calculation of VO2 - Find total amount of oxygen used in 1 min

    1. Subject is 60 kg, ventilation = 60L/min, Inspired O2 = 20.93%, Expired O2 = 16.93%

17A. How many mL/min this person was consuming?