Adipose tissue thickness affects in vivo quantitative near-IR spectroscopy in human skeletal muscle

Beekvelt, Mireille C. P. Van; BORGHUIS, M. S.; Engelen, B.G.M. van; Wevers, R.A.; Colier, Willy N.J.M.

doi:10.1042/cs1010021

Cited by 201 publications

(188 citation statements)

References 24 publications

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“…The mean value for m _ V VO 2 (O 2 Hb) was 22AE2% and the withinsubject variability ranged from 5AE4 to 45AE0%. This is in agreement with Kragelj et al (2000) who found a group CV of 21AE8% for m _ V VO 2 calculated from Hb diff and with our previous study (Van Beekvelt et al, 2001b) where we found a CV of 16AE2% within one test session. During exercise, the group CV was roughly the same for both methods.…”

Section: Methods Mvosupporting

confidence: 94%

In vivo quantitative near‐infrared spectroscopy in skeletal muscle during incremental isometric handgrip exercise

Beekvelt

Engelen

Wevers

et al. 2002

Clin Physio Funct Imaging

131

146

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The aim of this study was to investigate the performance of in vivo quantitative near-infrared spectroscopy (NIRS) in skeletal muscle at various workloads. NIRS was used for the quantitative measurement of O2 consumption (mVO2) in the human flexor digitorum superficialis muscle at rest and during rhythmic isometric handgrip exercise in a broad range of work intensities (10-90% MVC=maximum voluntary contraction force). Six subjects were tested on three separate days. No significant differences were found in mVO2 measured over different days with the exception of the highest workload. The within-subject variability for each workload measured over the three measurements days ranged from 15.7 to 25.6% and did not increase at the high workloads. The mVO2 was 0.14 +/- 0.01 mlO2 min-1 100 g-1 at rest and increased roughly 19 times to 2.68 +/- 0.58 mlO2 min-1 100 g-1 at 72% MVC. These results show that local muscle oxygen consumption at rest as well as during exercise at a broad range of work intensities can be measured reliably by NIRS, applied to a uniform selected subject population. This is of great importance as direct local measurement of mVO2 during exercise is not possible with the conventional techniques. The method is robust enough to measure over separate days and at various workloads and can therefore contribute to a better understanding of human physiology in both the normal and pathological state of the muscle.

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Section: Methods Mvosupporting

confidence: 94%

In vivo quantitative near‐infrared spectroscopy in skeletal muscle during incremental isometric handgrip exercise

Beekvelt

Engelen

Wevers

et al. 2002

Clin Physio Funct Imaging

131

146

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“…In this context, adipose tissue thickness is known to additionally affect the measurement of mO 2 , as the path of the light is different in adipose tissue compared with muscle tissue. Hence, a high amount of subcutaneous fat will result in an underestimation of mO 2 35 . However, as this study is based on a repeated within-subject measure design, effects of tissue thickness variability should not have any influence on the presented results.…”

Section: Discussionmentioning

confidence: 99%

“…To obtain the adipose tissue thickness the results from the caliper measurements were divided by two 35 .…”

Section: Methodsmentioning

confidence: 99%

Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch

Paternoster

Hahn

Stocker

et al. 2017

Sci Rep

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After an active muscle stretch, maintaining a certain amount of force in the following isometric phase is accompanied by less muscle activation compared to an isometric contraction without preceding active stretch at the corresponding muscle length. This reduced muscle activation might be related to reduced metabolic costs, such as the oxidative metabolism. Hence, the aim of this study was to clarify if mechanisms associated with stretch-induced activation reduction (AR) also influence oxygen consumption of voluntary activated human muscles after active stretch. Plantarflexion torque of 20 subjects was measured during 1) purely isometric and 2) active stretch contractions (26°, 60°/s), at a submaximal torque level of 30% MVC. Oxygen consumption (mO2) of gastrocnemius medialis (GM) was estimated by near-infrared spectroscopy while applying arterial occlusion. Since the overall group did not show AR at GM after active stretch (p > 0.19), a subgroup was defined (n = 10) showing AR of 13.0 ± 10.3% (p = 0.00). However, for both purely isometric and active contractions mO2 was the same (p = 0.32). Therefore, AR triggered by active stretch did not affect mO2 of active human muscle.

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“…Therefore an alternative explanation is a differential blunting of the near-infrared signal between groups due to the effects of subcutaneous adipose tissue thickness at the site of interrogation. Since fat acts as a low-scattering constant absorber of near-infrared light an increased subcutaneous fat thickness has the potential to blunt the interrogative depth of near-infrared light into the interrogated tissue and therefore reduce the detectable change in haemoglobin oxygenation in response to exercise (Bhambhani 2004;Van Beekvelt et al 2001). …”

Section: [Hhb] Kineticsmentioning

confidence: 99%

Pulmonary oxygen uptake and muscle deoxygenation kinetics during recovery in trained and untrained male adolescents

et al. 2011

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Previous studies have demonstrated faster pulmonary oxygen uptake ( 2 o V  ) kinetics in the trained state during the transition to and from moderate-intensity exercise in adults. Whilst a similar effect of training status has previously been observed during the on-transition in adolescents, whether this is also observed during recovery from exercise is presently unknown. The aim of the present study was therefore to examine 2 o V  kinetics in trained and untrained male adolescents during recovery from moderate-intensity exercise.15 trained (15 ± 0.8 yrs, ) male adolescents performed two 6-minute exercise off-transitions to 10W from a preceding "baseline" of exercise at a workload equivalent to 80% lactate threshold; s, P<0.01) and mean response time (Trained: 24.2 ± 9.2 s vs Untrained: 34 ± 13 s, P=0.05) of muscle deoxyhaemoglobin off-kinetics was faster in the trained subjects compared to the untrained subjects.kinetics was unaffected by training status; the faster muscle deoxyhaemoglobin kinetics in the trained subjects thus indicates slower blood flow kinetics during recovery from exercise compared to the untrained subjects.

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Adipose tissue thickness affects in vivo quantitative near-IR spectroscopy in human skeletal muscle

Cited by 201 publications

References 24 publications

In vivo quantitative near‐infrared spectroscopy in skeletal muscle during incremental isometric handgrip exercise

In vivo quantitative near‐infrared spectroscopy in skeletal muscle during incremental isometric handgrip exercise

Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch

Pulmonary oxygen uptake and muscle deoxygenation kinetics during recovery in trained and untrained male adolescents

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