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lactate/VO2max testing Douglas, Spain 29 Jun 2012 Hello Dr. and friends, I'd like to present some questions based on testing of 2 cyclists. The data and questions are translated from Spanish. A cyclists (rider A) weighing 70 kg, is 170 cm tall and has a VO2max of 82 ml kg-1 min-1, the threshold determined by the method described by Billat was a VO2 40 ml kg-1 min-1, pedaling at an intensity of 315 W at a frequency of 80 rpm for 10 minutes his blood lactate capillary earlobe was 6 mmol.l-1, with a respiratory quotient 0.98. His maximum heart rate was 192 beats / min. His blood hemoglobin concentration: 142 g / L. Another cyclist (B) weighs 73 kg, measured 189 cm and has a VO2max of 70 ml kg-1 min-1, the threshold determined with the method described by Billat was a 56 VO2 ml kg-1 min-1, pedaling at an intensity of 310 W at a frequency of 80 rpm for 10 minutes, blood lactate capillary earlobe was 2.0 mmol.l-1, with a respiratory quotient of 0.9. His maximum heart rate was 187 beats / min. and blood hemoglobin concentration at 140 g / L. Both riders are subjected to a program of training and competitions of 6 months. After this program tests were repeated and it was observed that rider A had a VO2max of 79 ml kg-1 min-1, the threshold determined by the method described by Billat, VO2 was a 50 ml kg-1 min-1, pedaling at an intensity of 335 W with a frequency of 80 rpm for 10 minutes his blood lactate capillary earlobe was 3 mmol.l-1 and the respiratory quotient was 0.88. His maximum heart rate was 189 beats / min. His blood hemoglobin concentration increased to 152 g / L and body mass (weight) decreased to 65 kg. Cyclist B had a VO2max of 80 ml kg-1 min-1, the threshold determined by the method described by Billat was 58 ml kg-1 min-1, pedaling an intensity of 375 W with a frequency of 80 rpm for 10 minutes his blood lactate capillary earlobe was 2.0 mmol.l-1 and the respiratory quotient was 0.91. His maximum heart rate was 184 beats / min. His blood hemoglobin concentration changed to 130 g / L and body mass did not change. Both tests were performed under similar conditions on the two cyclists before and after training. None had signs of overtraining. QUESTIONS: 1) Which two cyclists has improved more in relative terms with respect to his initial state? It is understood that a cyclist is in better shape if his output performance improved. 2) Are the values reflected normal or is there any statement that deviates from normal? At what level (elite, professional, amateur, etc. are the results observed after training? 3) Which of the two riders have improved their energy efficiency? 4) Which two cyclists would win a time trial of 55 km on a flat road?
He improved his AT by at least 6.3% CYCLIST B . VO2max increased by 14% after training (also this improvement is doubtfull...), it is possible he was not trained at the beginning of the tests. His AT increased by 20.9%. ANSWER YOUR QUESTIONS: 1) cyclist B 2) AT improvements are normal 3) both riders improved energy efficiency 4) depends on aero position : B develops 12% more watts at AT, but his frontal area is bigger.
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drferrari,
Italy 5 Jul 2012
