Re: metabolic equivalent unit (mets) formula

[George__0__0]

Posted By George on August 07, 1999 at 20:01:26
Hi,                                                       In july I had a stress test on bruce protocol treadmill.Doctor gave me all test results except for the mets.These are the results of the treadmill bruce stress test.                                                     Event     Time     Speed     Grade     HR     BP          rest                                   99     144/80      stage 1   3:00     1.7       10        121    160/80      stage 2   3:00     2.5       12        136                stage 3   3:00     3.4       14        154    182/82      stage 4   3:00     4.2       16        168                stage 5   2:34     5.0       18        185                stop ex. 14.34                                            Interpretation: The patient exercised for 14.34 minutes on a standard Bruce protocol and stopped because of fatigue.The HR rose to 185 beats and the BP rose to 182/82.He denied any chest discomfort.There were no significant ST segment change.Summary 1.Negative exercise EKG 2.Excellent exercise capacity.                        According to the above stress test results, how many METS did I achieve? What is the formula for METS in stress testing?Thank you.George                                  By away I am 35 years old male weigh 166 pounds and 5'11 feet tall.

[CF-CARDIO-MD-JMF]

Posted By CCF CARDIO MD JMF on August 08, 1999 at 14:57:36

Dear Gerge,
METS or metabolic equivalents are estimated by the work load estimated at 14 minutes of a  standard bruce protocol in your case.  
1 MET is equivalent to 3.5 ml of oxygen per kilogram body weight per minute.  14 minutes into a bruce protocol, you are walking 5.0 mph on an 18 % grade this is the equivalent of 16 - 17 mets.  or about 60 ml/kg/min of oxygen consumption.  In general, we do not ask people to exercise at more than 5 mets for cardiovascular benefit.
Sound like you're in great shape!  Keep up the good work!

I hope this has been useful. I wish you the best of luck. Feel free to write back.
Information provided here is for general purposes only. Specific questions should be addressed to your own doctor. If you would like to make an appointment at the Cleveland Clinic Heart Center, please call 1-800-CCF-CARE or inquire online by using the Heart Center website at www.ccf.org/heartcenter. The Heart Center website contains a directory of the cardiology staff that can be used to select the physician best suited to address your cardiac problem.












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