| Author | Message | ||
     Juerg Senior Member Username: Juerg Post Number: 1155 Registered: 04-2006 |
With the increase in customers interested in the Fit Mate , and the increase in actually buyer we are faced with the most common question : Why is the price of the Fit Mate Pro only 8000 dollar +- , versus a K2 with over 35'000 dollar and the next equipment used in Universities over 60'000 dollar. Let's go first on what is the same. The O2 sensor is the same as it is a galvanic Fuel cell used in all three equipment. The flow meter is the same with a maximum capacity of 300 l/ min. The limitation on accurate respiration frequency is the same and is okay up to 75 - 80 breath per minute, but with some warning , that the respiration is too high. What the Fit Mate Pro does not have is a CO2 sensor. And there is a major difference in the "accuracy" of the print outs of the result. I like to show you a printout first from a test from a very well accepted University Lab followed with a printout from a Fit Mate Pro :  now the printout from a Fit Mate Pro  As you can see the first printout is much more "impressive. Now here the difference: I like to go from info to info Data Fit mate Pro Expensive equipment t = Time Only in sec on 1/100 thousend Example 1 min 1 min 15 sec 1.036333 min Comment: Sure if you are interested how much O2 he is using at the o.ooo3 second . VO2kg only VO2 kg VO2 kg and VO2 l/min and only 23.3 here 26.13717 But we have as well on our excel sheet and in the life info VO2 ml/ min or you simply take body weight x VO2 / kg and you have the info as well. True you are not very accurate as your result may be : 3450 ml / min versus 3459872 ml / min Mets no Mets on printout Mets 1.627398 In the fit mate pro you have Mets in the life info and or you can calculate it as it is a simple multiplicator. Vco2 No Vco2 VCO2 RF respiratory Fr yes but only as 28.5 Bbm versus 28.55639 Bpm RER no Rer becasue no CO2 RER HR yes but only 110 versus 110.1657 bpm FeO2 yes but only 15.88 versus 15.85023 Vt or TV no yes and very accurate 2.985321 But on excel sheet easy to read out TV = VE : RF kcal yes but only 544kcal/h versus 29.46857 kcal No RER but check carefully for the lowest RER and for the lowest FeO2 and than start thinking ? VO2/ breath FaCT Excel yes nothing on the expensive VO2 / HR yes no VO2% of VE yes no and if we combine a Fit Mate pro with a Physio Flow we are still much cheaper but have additional SV/ LVET/ CO/ SVR/ Cardiac CT/ VO2 per ml SV and so on. So we have actually the real VO2 max VO2 max + CO x (a-v) O2 difference. Now here the very interesting point. In a VO2 max test we all think , that we measure actually how much O2 is used in a certain intensity. So if we can measure VE = 100 liter and we have a FeO2 of 15.9 % we assume we used 5 % O2 ? So from the 100 liter air how much % theoretically was O2 going in . Now if 15.9 % come out, how much is left or used inside. The result is ? Now take the numbers on both print outs and see, whether we have as a VO2 this expected numbers. ? Summary . You get what you pay for. As about 90 - 95 % of a test on any human person is variable ( Human physiological inaccuracy ) it is very crucial to have the other 5 - 10 % exact on 2.346721 positions ? Certainly for a coach , who is looking for a trend . Or what do you think . This always leaves me with a smile, if this is the first concern: On how many positions after the . is the heart rate measured ? So you are the judge . Have fun to read all of this |