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Old 08-14-2009, 05:13 PM   #6 (permalink)
ElegantlyWasted
Excellence... not Perfection
 
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Join Date: Apr 2006
Location: AZ
Posts: 1,190
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Yes and know... It depends on the intensity of the sprint vs the duration of a steady jog.
Here's a good way to look at it.

Compare average heart rate from sprint workout to average heart rate from sustained run.

The one with the higher average heart rate will have burned more calories.

For most people looking to burn fat; any sustained workout averaging over or around 100 beats per minute is what they should go for. As you get in better cardio shape you will have to work harder to obtain the same rate of bury.

Also keep in mind that the aerobic heart rate zone (around 120) burns fat more efficiently than higher heart rate zones.

Sprinting will do a better job of toning muscle.

Sounds like your doing great.... 30-40 min 3x per week should be all you need to get noticeable results and build a great cardio base.

Regards,
(wanna be pro-cyclist)
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