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    MET Equations

    Uploaded by

    Harrison JL Evans
    This document provides information and formulas for calculating metabolic rates and oxygen consumption (VO2) during various exercises using data from submaximal and maximal exercise tests. It includes conversion factors and equations for estimating VO2 during activities like walking, running, cycling, stepping, and arm ergometry. Examples are given for using the equations to calculate VO2 from data like workload, speed, grade, body weight, and heart rate.

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    MET Equations

    Uploaded by

    Harrison JL Evans
    785 views18 pages
    This document provides information and formulas for calculating metabolic rates and oxygen consumption (VO2) during various exercises using data from submaximal and maximal exercise tests. It includes conversion factors and equations for estimating VO2 during activities like walking, running, cycling, stepping, and arm ergometry. Examples are given for using the equations to calculate VO2 from data like workload, speed, grade, body weight, and heart rate.

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    This document provides information and formulas for calculating metabolic rates and oxygen consumption (VO2) during various exercises using data from submaximal and maximal exercise tests. It includes conversion factors and equations for estimating VO2 during activities like walking, running, cycling, stepping, and arm ergometry. Examples are given for using the equations to calculate VO2 from data like workload, speed, grade, body weight, and heart rate.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    785 views18 pages

    MET Equations

    Uploaded by

    Harrison JL Evans
    This document provides information and formulas for calculating metabolic rates and oxygen consumption (VO2) during various exercises using data from submaximal and maximal exercise tests. It includes conversion factors and equations for estimating VO2 during activities like walking, running, cycling, stepping, and arm ergometry. Examples are given for using the equations to calculate VO2 from data like workload, speed, grade, body weight, and heart rate.

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    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd
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    Metabolic Equations

    ACSM Formulas

    Conversion Factors
    used in Metabolic Calculations 1 KG= 2.2 lb
    160 lb/2.2=72.7 kg 60 kgX 2.2=132 lb

    1 inch= 2.54 cm
    12 in. x 2.54= 30.5 cm

    1 m= 100cm
    30.5 cm/100= 0.305 m

    1 mph= 26.8 meters per minute


    6.0 mph x 26.8 = 160.8 m.min

    Conversions, cont.
    Min/mile pace= 60 min/mph
    60 min/7mph= 8.6 min/mile or 8:36 min:sec/mile 60 sec x 0.6 min= 36 sec

    1 L = 1000 ml 1 L of O2= 5 kcal 1 MET = 3.5 ml . Kg . Min 1 MET = 1 kcal . Kg . Hr 1 Watt= 6 kgm.min
    540 kgm/6 = 90 Watts

    kgm.min= kg x 6 x rpm (monark cycle)

    Metabolic terms:
    Absolute VO2= rate of O2 uptake in Liters/min. Relative VO2= rate of O2 uptake in ml/kg/min. Used to compare VO2 between individuals of different body size. Gross VO2= total consumption of O2 under any circumstances Net VO2= O2 consumption rate above resting O2 consumption rate.
    Used to describe the caloric cost of exercise

    ACSM Leg Ergometry Equation:


    For power outputs between 300-1200 kgm/min, or 50-200 watts
    VO2= (1.8 x kgm/min)/ M (wt. in kg) +(7) Or VO2= (10.8 x watts) / M (wt. in kg) + (7)

    ACSM Leg Ergometry Equation


    To calculate the energy expenditure of a 62 kg woman cycling at a work rate of 450 kgm.min: VO2= (1.8 x 450)/ 62 + 7 VO2= 810/62 + 7 VO2= 13 + 7 VO2= 20 ml/kg/min

    ACSM Walking Equation


    For speeds of 50-100 m/min. (1.9-3.7 mph) VO2= Resting Component + Horizonal Component + Vertical Component R= 3.5 ml. kg. min.

    H=speed (m/min) X 0.1 V=grade (decimal) X m/min X 1.8


    VO2= (0.1 x S) + (1.8 x S x G) + 3.5
    (H) (V) (R)

    ACSM Walking Equation


    Calculate VO2 for a 70 kg subject who is walking on the treadmill at a speed of 3.5 mph and a grade of 10%: 1. Convert speed in mph to m.min (3.5 x 26.8= 93.8) 2. Calculate horizontal component. H = speed (m.min) x 0.1 (93.9 x 0.1 = 9.38 ml.kg.min) 3. Calculate vertical component: V= grade (decimal) x speed x 1.8 (.10 x 93.8 x 1.8= 16.88 ml.kg.min 4. Calculate total VO2 by adding H, V, and R (resting) components: VO2= H + V + R (9.38 + 16.88 + 3.5)= 29.76 ml.kg.min Convert VO2 to METS by dividing by 3.5: (29.76/3.5 = 8.5 METS

    ACSM Running/Jogging Formula


    For speeds > 134 m/min (>5.0 mph), (or for speeds as low as 3mph if jogging) VO2= Resting Component + Horizontal Component + Vertical Component R= 3.5 ml.kg.min H= speed (m/min) X 0.2 V= grade (decimal) X m/min X 0.9 VO2= (0.2 x S) + (0.9 x S x G) + 3.5
    (H) (V) (R)

    ACSM Jogging/running Formula


    Calculate VO2 for someone running a 7.5 mph. (200 meters/min) With a 5% grade? VO2= 3.5+ (m/min X 0.2) 43.5= 3.5 + (200 x 0.2) For uphill running, add:
    grade (decimal) x m/min x 0.9 VO2= 3.5 + (200 x 0.2) + (.05 x 200 x 0.9) VO2= 52.5

    Arm Ergometer Equation


    For power outputs between 150-750 kgm.min or 25-125 watts: VO2= (3 x kgm) / kg + 3.5 Or VO2= (18 x watts) / kg + 3.5

    ACSM Arm Egometer Equation


    Calculate VO2 for a 50 kg. Individual cycling at 600 kgm: VO2= 3 x 600/50 +3.5 VO2= 1800/50 + 3.5 VO2= 36 + 3.5 VO2= 39.5 ml.kg.min

    ACSM Stepping Equation


    Convert stepping height in inches to meters Stepping rate is steps per minute VO2= (0.2 x stepping rate) + (1.33 x 1.8 x step height in meters x rate) + 3.5

    ACSM Stepping Equation:


    To calculate VO2 for bench stepping using a 16 inch step height at a cadence of 24 steps/min. 16 inches = .4064 meters (0.2 x 24) + (1.33 x 1.8 x .4064 x 24) + 3.5 VO2= 4.8 + 30.5 + 3.5 VO2= 38.8 ml/kg/min

    Estimating VO2 from Maximal Bruce Protocol


    Male: VO2 max = 14.76 - (1.379 x time) + (0.451 x time2) - (0.012 x time3) Female: VO2 max= (4.38 x time) 3.90

    Estimating VO2 Max from Balke Protocol (max)


    Male: VO2 max= 1.444 x time + 14.99 Female: VO2 max= 1.38 x time + 5.22

    Estimating VO2 max from Submax Treadmill Protocol


    (multistage)
    Use HR and WL data from two or more submaximal stages of treadmill test. Client must reach steady-state HR between 115-150 Determine slope: (b)= (SM2-SM1)/(HR2-HR1)
    SM1 and SM2 are expressed as VO2

    VO2= SM2 + b (Hr max- HR2)

    Estimating VO2 from Submaximal Treadmill Test


    (single-stage)
    Use one submaximal HR and one workload Steady-state HR should reach between 130-150 bpm Calculate SM VO2 and METS using ACSM equation (remember1MET= 3.5 ml/kg/min) VO2 (male)= SM VO2 (expressed as METs) x (Hrmax-61)/
    (HRsm- 61)

    VO2 (female)= SM VO2 (expressed at METs) x (Hrmax72)/ HRsm 72)

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