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11/16/09 3:07 P

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The MHR formulae are ways of estimating your MHR. Your actual MHR is the highest rate your heart can possibly beat. It can be determined experimentally by an all-out effort but it is difficult for anyone to push themselves this hard so sometimes it takes a few tries to be sure. If your conditioning is not high it probably isn't safe to attempt this without a doctor and crash cart nearby.

My MHR has always been higher than predicted by my age; in fact I frequently exceeded my calculated MHR during interval training.

TDSLOVEY's Photo TDSLOVEY Posts: 1,194
11/16/09 10:43 A

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HRM & Target Heart Rate questions - cross posted

My HRM is a Reebok Precision that is fairly inexpensive but seems to be in par with the machines at the gym. To calculate my target heart rates, the Reebok HRM suggest this formula:

The Target Heart Rate formula:
220-age (MALE) OR 230-age (FEMALE) = MAX heart rate
Intensity 1: 60%-70% of this max for weight maintenance
Intensity 2: 70%-80% of this max for aerobic level for weight loss

I looked online and most sites used 220. I am doing a Biggest Loser weight loss challenge and they suggested the following:
220-age = MAX heart rate
Target heart rate should be between 60 – 80%

I know this formula is not the most accurate way but I want something simple. I want to be able to interpret the information. My questions are:

1. Should I use 220 or 230 to begin the formula?
2. Should I use a 60-80% or 70-80%?

Here is some personal data for reference:
MHR is 183 using the 220 formula
60% - 80%: 110 - 146
70% - 80%: 128 - 146

MHR is 183 using the 230 formula
60% - 80%: 116 - 154
70% - 80%: 135 - 154

Exercise class results
Biggest Loser class (sorta boot camp like)
11/9/09 – Duration 37 mins, MHR – 165, Avg HR – 126, calories burned – 292
11/16/09 – Duration 37 mins, MHR – 161, Avg HR – 126, calories burned – 300
I burned relatively the same calories but the second class didn’t feel nearly as intense as the first at all.

Body Pump (light weights, high reps)
11/12/19 – Duration 60 mins, MHR – 131, Avg HR – 104, calories burned – 284

Running (3min run/ 1min walk) – run pace was my race pace because my running partner was faster than me and she was going slowly due to injury.
11/15/19 – Duration 98 mins, MHR – 157, Avg HR – 140, calories burned – 884

This is the year of a healthier me.
Nothing tastes as good as skinny feels.

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