If Client "A" burns more calories than Client "B" during the same workout, did Client "A" work harder than Client "B"?
I do a buddy training session for two women (same age), and both women wear heart rate monitors during the session. Both clients have their age, height, weight, gender, and resting heart rate entered in to their HR monitors. At the end of a 30-minute session, Client "A" has burned 475 calories while Client "B" has burned only 320 calories. Client "B" is frustrated because she did the exact same work out as Client "A" and did not burn nearly as many calories. Based on the HR monitor readings, Client "A's" max HR during the session was higher than Client "B's." Does this mean that Client "B" is more fit than Client "A" and that it is going to take more exertion for Client "B" to achieve the same calorie burn as Client "A?" Is Client "B" not working as hard as Client "A," even though Client "B" feels like she worked as hard as she could during the workout? Could it be possible that both clients are equally fit and one just has a physically bigger heart than the other?
If you're looking for comparisons, always compare the individual to themselves - in other words their calorie burn etc. with different exercise intensities compared to themselves at rest etc.
When you say Max Heart Rate, do you mean, Optimum?
My thoughts are mixed with this question.
I don't like having my clients "compete" with one another, we all work out differently
Also, Heart Rate Monitors are only a part of the equation,. I would also go by waist/hip measurements, or skin fold measurements
I suggest having them switch heart rate monitors and see what happens.
as Susan says, there are many variables that serve as possible explanations.
One can be different body weights. By the calibration of caloric energy expenditure, a person with higher body weight will burn more calories if all else is equal.
Another: even though the 'standard' of heart rate training is 220 minus age and so on, the true maximum heart rate can vary quite a bit from person to person and can only be determined in a VO2 test. Heart rate monitors just operate with set formulas that cannot take that into account.
Another can be the manufacturer of the heart rate monitors.
I would leave that kind of competition alone and go by rating of perceived exertion which - by your description - appears to be very similar.
Hope this helps.
Factors that influence V02 are, cardiac output, one's level of conditioning, one's body weight.
As fitness professionals we all know that at rest the average 70kg individual pumps 3.5ml/kg/min of oxygen. Every litre of oxygen consumes about 4-5 calories per minute. If one weighs more or less than those 70kg oxygen consumption or caloric expenditure is increase or decreased.
If the world were perfect and both clients A and B were of the same gender, same weight and equally conditioned the caloric expenditures would be the same.
Hope this helps.
Fat works like insurance. The more you have the less you burn. Individuals with high percentages of muscle can eat massive amounts for dinner and still weigh less in the morning. Overweight individuals can work incredibly hard but still lose very little, because their muscles do not burn as much.
"Burning calories" is based more on how someone is able to consistently workout.
Actually, Client B could be better conditioned if the heart rate is lower. Therefore, Client A would be making the greater gains. Both clients have positive results that they should be pleased with. Everyone is different, which can even cause varied results on monitors.
I do not encourage clients to compare themselves; although, it is very difficult to avoid that competition bug. Use it as an entertainment tool with the emphasis on each client's personal improvements.