scholarly journals The Variation of Muscle Oxygen Consumption With Velocity of Shortening

1965 ◽  
Vol 49 (1) ◽  
pp. 9-15 ◽  
Author(s):  
R. J. Baskin
Keyword(s):  
Oxygen Consumption ◽  
Mechanical Efficiency ◽  
Sartorius Muscle ◽  
Maximum Oxygen Consumption ◽  
Shortening Velocity ◽  
Muscle Oxygen ◽  
Velocity Of Shortening ◽  
Muscle Oxygen Consumption ◽  
The Relationship ◽  
Frog Sartorius

Total oxygen consumption following contraction at controlled shortening velocities was determined for ten twitches of frog sartorius muscle. Under the conditions of this investigation maximum oxygen consumption occurred at approximately 30 mm/sec. shortening velocity and decreased for larger and smaller velocities. Mechanical efficiency was calculated and found to show a maximum at approximately 20 mm/sec. shortening velocity. The relationship between this study and a similar investigation in which heat changes are measured as a function of shortening velocity is discussed.

The relationship between two different mechanical cost functions and muscle oxygen consumption

2006 ◽  
Vol 39 (4) ◽  
pp. 758-765 ◽  
Author(s):  
M. Praagman ◽  
E.K.J. Chadwick ◽  
F.C.T. van der Helm ◽  
H.E.J. Veeger
Keyword(s):  
Oxygen Consumption ◽  
Cost Functions ◽  
Muscle Oxygen ◽  
Muscle Oxygen Consumption ◽  
The Relationship

scholarly journals The relationship between initial creatine phosphate breakdown and recovery oxygen consumption for a single isometric tetanus of the frog sartorius muscle at 20 degrees C.

1979 ◽  
Vol 73 (2) ◽  
pp. 159-174 ◽  
Author(s):  
M Mahler
Keyword(s):  
Oxygen Consumption ◽  
Time Course ◽  
Atp Hydrolysis ◽  
Creatine Phosphate ◽  
Sartorius Muscle ◽  
Exothermic Reactions ◽  
Rate Of Oxygen Consumption ◽  
The Relationship ◽  
Frog Sartorius

A previous paper (Mahler, M. 1978 J. Gen. Physiol. 71:559--580) describes the time-course of the suprabasal rate of oxygen consumption (delta QO2) in the sartorius muscle of R. pipiens after isometric tetani of 0.1--1.0 s at 20 degrees C. To test whether these were the responses to impulse changes in the rate of ATP hydrolysis, we compared the total suprabasal oxygen consumption during recovery (delta[O2]) with the amount of ATP hydrolyzed during a contraction, measured indirectly as the decrease in creatine phosphate (delta[CP]O). If suprabasal ATP hydrolysis during recovery is negligible in comparison with that during contraction, delta[CP]0/delta[O2] should approximate the P:O2 ratio for oxidative metabolism, which has an expected value of 6.1--6.5. We found: formula; see text. We conclude that in this muscle at 20 degrees C: (a) after a tetanus of 0.2--1.0 s, delta QO2(t) can be considered the response to an impulse increase in the rate of ATP hydrolysis; (b) the reversal during recovery of unidentified exothermic reactions occurring during the contraction (Woledge, R. C. 1971. Prog. Biophys. Mol. Biol. 22:39--74) can be coupled to an ATP hydrolysis that is at most a small fraction of delta[CP]0; (c) the pooled mean for delta[CP]0/delta[O2], 6.58 +/- 0.55, sets an experimental lower bound for the P:O2 ratio in vivo.

Relation of blood flow to VO2, PO2, and PCO2 in dog gastrocnemius muscle

1988 ◽  
Vol 255 (5) ◽  
pp. H1004-H1010 ◽  
Author(s):  
D. E. Mohrman ◽  
R. R. Regal
Keyword(s):  
Blood Flow ◽  
Steady State ◽  
Gastrocnemius Muscle ◽  
Muscle Blood Flow ◽  
Carbon Dioxide Tension ◽  
Experimental Conditions ◽  
Muscle Oxygen ◽  
Muscle Oxygen Consumption ◽  
Relationship Of ◽  
The Relationship

We pump-perfused gastrocnemius-plantaris muscle preparations at constant pressure to study the relationship of muscle blood flow (Q) to muscle oxygen consumption (VO2), venous oxygen tension (PVO2), and venous carbon dioxide tension (PVCO2) during steady-state exercise at different rates. Tests were performed under four experimental conditions produced by altering the perfusate blood-gas status with a membrane lung. The consistency of the relationship of Q to other variables was evaluated by statistical analysis of fitted curves. Not one of the above listed variables had the same relationship with Q in all four of the experimental conditions we tested. However, we did find that a consistent relationship existed among Q, PVO2, and PVCO2 in our data. That relationship is well described by the equation (Q-23).[PVO2 - (0.5.PVCO2) - 3] = 105 (when Q is expressed in ml.100 g-1.min-1 and PVO2 and PVCO2 in mmHg). One interpretation of this result is that both PO2 and PCO2 are important variables in the control of blood flow in skeletal muscle the combined influence of which could account for nearly all of the hyperemia response to steady-state muscle exercise.

Fatigue Increases in Resting Muscle Oxygen Consumption after a Women’s Soccer Match

2020 ◽  
Author(s):  
Aldo Alfonso Vasquez Bonilla ◽  
Rafael Timon ◽  
Alba Camacho-Cardeñosa ◽  
Marta Camacho-cardeñosa ◽  
Samantha Guerrero ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Muscle Pain ◽  
Perceived Exertion ◽  
Arterial Occlusion ◽  
Muscle Oxygenation ◽  
Soccer Match ◽  
Muscle Oxygen ◽  
Muscle Oxygen Consumption ◽  
Resting Muscle ◽  
Women's Soccer

AbstractCurrently, near infrared spectroscopy has a clear potential to explain the mechanisms of fatigue by assessing muscle oxygenation. The objective of the study was to observe the changes in muscle oxygen consumption after an official women’s soccer match. The sample was 14 players who competing in the second division of Spain of women’s soccer. They were evaluated before, immediately after and 24 h after the official match. Biochemical parameters were measured in blood plasma (BUN, GOT, LDH, CPK). The jumping in countermovement, perceived exertion and perceived muscle pain were also assessed. The muscle oxygen consumption and muscle oxygen saturation were evaluated in the gastrocnemius muscle with an arterial occlusion test. ANOVA of repeated measures, Pearson’s correlation and Hopkins’ statistics were applied to measure the magnitudes of change and effect size. There was observed an increase in kinetics of SmO2 at 24 h after the official match, using arterial occlusion. In addition, it was found that the increase in muscle oxygenation correlated with fatigue indicators, such as the increases in LDH, perceived muscle pain and the decrease in countermovement. It is confirmed that a women’s soccer match produced an increase of resting muscle oxygenation in 24 h after the official match.

scholarly journals Knee extensor muscle oxygen consumption in relation to muscle activation

2006 ◽  
Vol 98 (6) ◽  
pp. 535-545 ◽  
Author(s):  
R. D. Kooistra ◽  
M. E. Blaauboer ◽  
J. R. Born ◽  
C. J. de Ruiter ◽  
A. de Haan
Keyword(s):  
Oxygen Consumption ◽  
Muscle Activation ◽  
Knee Extensor ◽  
Extensor Muscle ◽  
Muscle Oxygen ◽  
Muscle Oxygen Consumption

scholarly journals Muscle oxygen consumption by NIRS and mobility in multiple sclerosis patients

BMC Neurology ◽  
2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Anna Maria Malagoni ◽  
Michele Felisatti ◽  
Nicola Lamberti ◽  
Nino Basaglia ◽  
Roberto Manfredini ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Oxygen Consumption ◽  
Muscle Oxygen ◽  
Muscle Oxygen Consumption ◽  
Multiple Sclerosis Patients
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