We received reports on VO2 at rest from our
athletes. The testing was done 16 hours
after the last regular practice. The
values were high, 404 ml/ min in one case, and 6.49 ml/kg/min in another
case. The first thing that came to my
mind was to call Volkswagen for an explanation on the machine now that we know
about the fraud with the software used to measure gases. Of course, I did not call, but I still think
that it could be related to the machine used to measure the VO2 at rest (red
flag). The athletes were training
regularly, they were growing up accordingly because they were adolescents. Their laboratory data was within normal
limits, and they did not have illnesses or problems living at home. Our second question after the machines
measuring the gases, it was whether this is a case of EPOC (post-exercise
oxygen consumption). We reviewed the
literature on EPOC.
The literature deals mainly with the effect and
control of EPOC peripherally instead of centrally:
The direction of this
research narrative on post-exercise recovery differs to the increasing emphasis
on the complex interaction between both central and peripheral
factors regulating exercise intensity during exercise performance.
Given the role of the central nervous system (CNS) in motor-unit recruitment
during exercise, it too may have an integral role in post-exercise recovery.
Indeed, this hypothesis is indirectly supported by an apparent disconnect in
time-course changes in physiological and biochemical markers resultant from
exercise and the ensuing recovery of exercise performance.
Is recovery driven by central or peripheral
factors? A role for the brain in recovery following intermittent-sprint
exercise
EXCESS POST-EXERCISE OXYGEN CONSUMPTION AND SUBSTRATE
UTILIZATION IN CHILDREN AND ADULTS
At the end, we found a Kenyan study that deals with
respiratory parameters in elite runners:
Table 4.10:
Resting values for respiratory variables (Mean ± SD) summarized by gender and
combined/total; male (n = 10), female (n = 4), total (n = 14).
Respiratory Variable
Gender Male Female Total
Resting tidal volume [L] .55±.14 .38±.11 .50±.15
Resting breathing frequency
[br/min] 21.64±4.40
20.78±2.94 21.39±3.94
Resting minute ventilation [L]
8.57±1.61 5.88±1.64 7.80±2.00
Resting volume of oxygen consumption
[L/min] .29±.07
.18±.07 .26±.08
Resting volume of carbon dioxide
produced [L/min] .25±.06
.15±.05 .22±.07
Resting respiratory exchange ratio
.86±.08 .84±.04 .86±.066
Rate of oxygen consumption (relative to body
weight) at rest [ml/kg/min]
5.30±1.10 3.84±1.41 4.89±1.33
The Kenyans’ values are more in accordance with our
athletes. Our athletes are younger but
the values are higher compared to the Kenyan’s values. Is the V02 of any value to measure training
level? Theoretically it could be a
marker but needs to be standardized, what we see in well trained athletes is
what counts and our findings are in that direction. Is our empirical research enough to say that
VO2 resting level is a good marker for quality of training? It is enough for us that deal with
performance.
Our findings are not related to EPOC but to a good
quality training. We are hoping to come
up with an answer from Volkswagen to see how good it is VO2 as a marker for
quality of training. But we can say that
taking into consideration our five athletes tested it is a good marker:
19-year-old male VO2: 404 6.21
ml/kg/min
18-year-old male VO2: 283 4.16
ml/kg/min
17-year-old male VO2:
387 5.73 ml/kg/min
15-year-old female VO2:
282 5.22 ml/kg/min
11-year-old female VO2: 237 6.49 ml/kg/min
Our athletes have learned the same technique, so the
VO2 is taken when they practice the same and use the same muscles. Performance in triathlon is according to
their resting VO2 shown above. The
11-year-old is unique for her age; she can train with the 14-year-old girls and
leads the swimming lane.
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