Artikel Oxygen Near Infrared

13 important questions on Artikel Oxygen Near Infrared

Name some keywords of this article about oxygen

  • mVO2
  • near-infrared
  • isometric angle
  • muscle length
  • metabolic cost

What is said about the relationship between Time to force failure and a single voluntary submaximal isometric contraction?

The relationship is an inverse one, with shorter muscle length leading to a longer time to fatigue.

What would be an hypothesis about the delayed time to fatigue in an isometric contraction in short muscles?

  • Lower metabolic cost because of cross-bridge non-optimum.
  • Greater twitch potentiation at shorter muscle lengths
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

Why did the authors investigate an 'old hypothesis' while there seems a lot of evidence debunking it?

Well... Because they think that they have debunked option B... And because they think there is no option C, they opt for option A again.

What does NIRS measure?

changes in ocyhemoglobin and deoxyhemoglobin/myoglobin in superficial parts of surface muscles

What is a limitation of NIRS?

It can only show superficial muscle oxygenation
It cannot distinguish between hemoglobin and myoglobin

What were results about voluntary activation in the study on knee angle energy metabolism?

VA was greater at the 90deg angle compared to 30 and 60.

At which knee angle were MTC and MVC highest?

At the 60 deg angle

What can be concluded from measures with NIRS when taking into account the skinfold thickness?

Measured maximal deoxygenation is always an underestimation of true deoxygenastion.

Maximal deoxygenation was similiar across knee angles, what does this indicate?

Skinfold thickness probably did not increase or decrease when changing angle.

What is the main finding of the article on knee angle oxygen metabolism article?

mVO2 during constant isometric knee extensions was lower at the 30° knee angle compared with sustained torque production at greater knee flexion angles.

How did the authors correct for local differences in the tissue?

Normalisation of the mVO2 slope to maximal possible changes.

What are the practical implications of the finding in the study on knee angle metabolism?

Unknown as the authors cannot make clear what the mechanisms behind their  measures are.

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo