Sunday, August 7, 2011

Understanding Heart Rates

In my previous post I outlined the importance of cardiovascular training for a healthy heart. In order to train smart and effectively you need to understand your heart rate and what the numbers represent. To do this you need to monitor how hard your heart is working and compare it to how hard it should be working.

FITNESS TARGET ZONES

                           Exercise Level                                   Benefits                             Intensity Level
                                                                                                                                    (Max HR%)
                           Light exercise                    Healthy heart maintenance                       50-60%

                             Weight loss                            Primarily burns fat                                60-70%

                           Aerobic (base)                 Increases stamina and endurance                   70-80%

                             Anaerobic                Fitness conditioning, muscle building                 80-90%
                       (conditioning)                           and athletic training

                          Elite (VO2 max)                 Athletic training and endurance                  90-100%

To work out your maximum heart rate use this simple equation: HRmax = 220 - age

When you are exercising the easiest way to find out your heart rate is to use a heart rate monitor. But for those who do not have one, there are a couple of methods to find out manually.
  1. Radial artery - runs down the inside of your lower arm. Measure about 2 inches (5cm) from your wrist using 2 or 3 fingers pressed against your skin.
  2. Carotid artery - runs down the side of your neck. Place your index and middle fingers beneath the border of the jaw, pressing lightly.


The most accurate measurement is if you count the number of beats in 60 seconds. Otherwise just count the number of beats in 6 seconds then times that number by 10 or count the number of beats in 10 seconds then times that number by 6.

Example: Amy is 25 years old and has been running on the treadmill for 30mins. She measures her heart rate for 6 seconds and counts 17 beats.
  • 17 x 10 = 170 beats per minute
  • Amy's HRmax = 220 - 25 = 195
  • Intensity level = 170/195 x 100 = 87% (anaerobic conditioning)
So the next time you exercise why not give it a go and see how hard your heart is working!

JW

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