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Juerg Feldmann

Fortiori Design LLC
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Posts: 1,530
 #1 
Interesting enough , I had a few rowers on my mailbox and even on thephone lately asking for options to use NIRS  in rowing on teh water and indoor.
 Answer is YES.
 This is a great sport to use MOXY as we now can have a much better idea on looking at upper body  core and leg invlolvement in teh overall performance. VO2  was great but it olbnly gives us  an indirect information that we sued oxygen . Now you combine VO2   for respiratory information and you  look at  O2 use in arms core  and legs and you see, where  is tehlimiter and how can  we compensate and therefor   you can designe a much better targetted  training program.
 The beauty is , that you can see it   as you row on teh water as well..
 Is it just us. Now  it is used  as well in  and from otehr people here a nice short summary of a stduy .
 

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J Biomed Opt. 2010 Jan-Feb;15(1):017007. doi: 10.1117/1.3309741.

Comparisons of muscle oxygenation changes between arm and leg muscles during incremental rowing exercise with near-infrared spectroscopy.

Source

Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Wuhan, China.

Abstract

Our purpose is to compare the changes in muscle oxygenation in the vastus lateralis (VL) and biceps brachii (BB) muscles simultaneously using near-infrared spectroscopy (NIRS) during incremental rowing exercise in eight rowers. Based on the BB and VL muscle oxygenation patterns, two points are used to characterize the muscle oxygenation kinetics in both the arm and the leg muscles. The first point is the breaking point (Bp), which refers to an accelerated fall in muscle oxygenation that correlates with the gas exchange threshold (GET). The second point is the leveling-off point (Lo), which suggests the upper limit of O(2) extraction. The GET occurred at 63.3+/-2.4% of maximal oxygen uptake (VO(2 max)). The Bp appeared at 45.0+/-3.8% and 55.6+/-2.4% VO(2 max) in the BB and VL, respectively. The Lo appeared at 63.6+/-4.1% and 86.6+/-1.0% VO(2 max) in these two muscles, respectively. Both the Bp and the Lo occurred earlier in BB compared with VL. These results suggest that arm muscles have lower oxidative capacity than leg muscles during rowing exercise. The rowers with higher exercise performances showed heavier workloads, as evaluated by Bp and Lo. The monitoring of muscle oxygenation by NIRS in arm and leg muscles during rowing could be a useful guide for evaluation and training.

Juerg Feldmann

Fortiori Design LLC
Registered:
Posts: 1,530
 #2 
The interesting part we start to see now,  is the reality , that different people react very individually , when we look at reactions in one body part  and than get a second area involved like in cross country skiing with leg work only than you add arms  or arms only , or in rowing by testing legs only or arms only or all together, or in MTB  when riding  with mainly leg work and than shift to a section where arm activities are involved as well.
 The fact, that we see this shifts opens a very new way on training  our body by either " steeling " blood from one body part and  using it  in an other area  and so on.  Is this theory or  can it be tested. Here a  nice summary toward this idea and  helps us to feel  better and not too lonely with our ideas in using MOXY.
 :
 
J Sports Med Phys Fitness. 2005 Sep;45(3):257-63.

Effect of arm cranking on oxygenation of vastus lateralis and lateral gastrocnemius muscles during leg cycling.

Source

Laboratory of Exercise Physiology, Graduate School of Education, Hokkaido University, Sapporo, Japan. hogata@edu.hokudai.ac.jp

Abstract

AIM:

The purpose of this study was to compare the changes in oxygenation in exercising vastus lateralis muscle (VL) and lateral gastrocnemius muscle (LG) when arm cranking is added to on-going leg cycling.

METHODS:

Change in oxygenation (difference between concentrations of oxygenated hemoglobin and deoxygenated hemoglobin, HbD) was determined using near-infrared spectrometry. Before the combined exercise, each subject (n=8) rested for 5 min and then performed 10-min constant-work-rate leg cycling. The intensities of leg cycling were 20% and 40% of peak oxygen uptake (VO2peak) during incremental leg cycling (LC20 and LC40). Arm cranking at an intensity of 60% of VO2peak recorded during incremental arm cranking (AC60) was added to the on-going leg cycling (both AC60LC20 and AC60LC40 in two separate sessions) for 6 min.

RESULTS:

During AC60LC20, HbD in both the VL and LG showed significant decreases compared to the control value (1 min before combined exercise: LC20). During AC60LC40, a significant decrease in HbD compared to the control value (1 min before combined exercise: LC40) was observed only in the LG. In the VL, the integrated electromyogram (iEMG) during AC60LC40 was significantly larger than that during AC60LC20, whereas in the LG, no significant difference was found between the iEMG during AC60LC40 and that during AC60LC20. These results suggest that the decrease in HbD in the exercising leg muscles is related to the level of its muscle activity after the addition of arm cranking.

CONCLUSION:

The results suggest that HbD shows different changes in exercising leg muscles due to the difference in its activity level when arm cranking is added to on-going leg cycling.

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