Work Unit Conversions1 MET = 3.5 ml/kg/min 1 MET = 1 kcal/kg/hr L/min to ml/kg/min = divide L/min by the subject's body weight in kg, then multiply x 1000 ml/kg/min to L/min = multiply ml/kg/min by the subject's body weight in kg. then divide by 1000 L/min to kcal/min = multiply L/min x 5 kcal/min to L/min = divide kcal/min / 5 ml/kg/min to METS = divide ml/kg/min by 3.5 METS to ml/kg/min = multiply METS x 3.5 METS to Kcal/min = multiply METS x 3.5 x body weight in kg then divide by 200 Speed Conversions1 mph = 26.8 m/min 1 mph = 1.62 km/hr 1 km/hr = 0.62 mph Weight Conversions1 kg = 2.2046 lbs 1 kg = 9.8 N 1 kg = 1000g Distance Conversionsfeet to meters, multiply feet x 0.3048 meters to feet, multiply meters x 3.281 inches to meters, multiply inches x 0.0254 meters to inches, multiply meters x 39.37 miles to meters, multiply miles x 1609 meters to miles, divide meters / 1609 Pace Conversions (To find pace in min : sec per mile)A. Find the reciprocal of mph ( 1 / mph ) B. Multiply the reciprocal of mph x 60 C. The whole number portion is the minute part of min : sec per mile D. Multiply the decimal portion of this number x 60 E. The decimal portion x 60 is the seconds part of min : sec per mile Example: Find the pace of a runner who is running at 7.8 mph. A. 1 / 7.8 = 0.1282 B. 0.1282 x 60 = 7.692 C. The minutes part of pace is 7 D. 0.692 x 60 = 42 (rounded) E. The pace is 7:42 or 7 min 42 sec per mile. Power Conversions To find power in kgm/min, divide work in kgm / time in minutes To find power in watts, divide work in joules / time in seconds kgm/min to watts = multiply kgm/min x 0.164 watts to kgm/min = multiply watts x 6.12 kgm/min to kcal/min = multiply kgm/min x 0.0023 kcal/min to kgm/min = multiply kcal/min x 427 kcal/min to watts = multiply kcal/min x 69.8 watts to kcal/min = multiply watts x 0.014 Energy Conversions 1kcal is the energy required to raise the temperature of 1 kg of water 1 degree Celsius; 540 kcal evaporates 1 kg of water kcal to kgm, multiply kcal x 427 kgm to kcal, divide kgm / 427 kcal to joules, multiply kcal x 4190 joules to kcal, divide joules / 4190 ACSM Metabolic Equations
VO Speed is calculated in m/min. Grade = fraction of the elevation / distance The numbers 0.1 and 1.8 are constants that refer to the following: 0.1 = oxygen cost per meter of moving each kilogram (kg) of body weight while walking (horizontally) 1.8 = oxygen cost per meter of moving total body mass against gravity (vertically)
VO Speed is calculated in m/min. Grade = fraction of the elevation / distance The numbers 0.2 and 0.9 are constants that refer to the following: 0.2 = oxygen cost per meter of moving each kg of body weight while running (horizontally) 0.9 = oxygen cost per meter of moving total body mass against gravity (vertically)
VO *You may need to convert watts to kgm/min (1 watt = 6 kgm/min). The numbers 1.8 and 7 are constants that refer to the following: 1.8 = oxygen cost of producing 1 kgm/min of power output 7 = oxygen cost of unloaded cycling plus resting oxygen consumption
VO Since the height that needs to be plugged into the equation is in meters, you must convert inches to meters (1 inch = 0.0254 meters). The numbers 0.2, 1.8 and 1.33 are constants that refer to the following: 0.2 = oxygen cost of moving horizontally during stepping 1.8 = oxygen cost of moving vertically during stepping 1.33 = correction factor for positive and negative (up and down) component of stepping Glossaryj - joules kcal - kilocalories kcal/min - kilocalories per minute kg - kilograms kgm - kilogram-meters kgm/min - kilogram-meters per minute L - liters L/min - liters per minute m/min - meters per minute MET - metabolic equivalent (3.5 ml/kg/min) ml/kg/min - milliliters per kilogram per minute mph - miles per hour VO2 - volume of oxygen or rate of oxygen consumption w - watts |