Physiological Response to Submaximal Isometric Contractions of the Paravertebral Muscles

Jensen, Bente Rona; Jørgensen, Kenneth Mølbjerg; Hargens, Alan R.; Nielsen, Peter Kresten; Nicolaisen, T

doi:10.1097/00007632-199911150-00008

Cited by 53 publications

(68 citation statements)

References 27 publications

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“…Jensen et al [20] found a significant decrease in the oxygenation of the paravertebral muscles with corresponding intramuscular pressure levels of between 30 mmHg and 40 mmHg. However, these results are only given for six out of nine subjects in the study.…”

Section: Discussionmentioning

confidence: 98%

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Intramuscular pressure, tissue oxygenation and EMG fatigue measured during isometric fatigue-inducing contraction of the multifidus muscle

et al. 2005

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Section: Discussionmentioning

confidence: 98%

“…According to the model, a muscle contraction leads to an increase in intramuscular pressure [20]. When the compartment pressure rises above a physiological threshold, the blood supply is reduced and the tissue's oxygen content decreases [11,28,44].…”

mentioning

confidence: 99%

Intramuscular pressure, tissue oxygenation and EMG fatigue measured during isometric fatigue-inducing contraction of the multifidus muscle

et al. 2005

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“…The most likely reason for the discrepancy between the two studies is that RILL involves considerable isometric activity in the erector spinae muscles, whereas the muscle contractions during cycling are predominantly isotonic in nature. Previous research that has used NIRS to evaluate erector spinae hemodynamics during isometric exercise suggests that the decrease in BV is due to a reduced blood perfusion (occlusion) that is secondary to the increase in intramuscular pressure (Jensen et al 1999). McGill et al (2000 reported that erector spinae OXY decreased systematically during isometric contractions ranging from 2% to 30% maximum voluntary contraction (MVC), and suggested that this decrease was most likely due to a reduction in BV.…”

Section: Nirs Trends During Rillmentioning

confidence: 99%

“…Recently, several studies have used NIRS to examine localized changes in muscle oxygenation and blood volume during isometric contractions of the lower back (Jensen et al 1999;Kunimune et al 1999;McGill et al 2000;Yoshitake et al 2001). These studies suggest that NIRS is a sensitive technique for measuring tissue oxygenation and blood volume changes during such contractions, and therefore could be useful in the measurement of localized muscle fatigue.…”

Section: Introductionmentioning

confidence: 99%

Cardiorespiratory and hemodynamic responses during repetitive incremental lifting and lowering in healthy males and females

Kell

Bhambhani

2003

Eur J Appl Physiol

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The purposes of this study were twofold. First, to evaluate the cardiorespiratory and muscle oxygenation (OXY)/blood volume (BV) responses during repetitive incremental lifting and lowering (RILL) in healthy males and females. Second, to develop a predictive equation for predicting peak aerobic power (VO(2peak)) during RILL from the cardiorespiratory, OXY/BV and body composition variables. Fourteen males and 18 females [mean (SD) for age, height and body mass were: 29.6 (8.2) years; 1.75 (0.07) m; 78.9 (10.4) kg and 23.9 (2.1) years; 1.63 (0.06) m; 62.3 (6.3) kg, respectively] completed a RILL from floor to table height at 10 lifts/min to voluntary fatigue. Cardiorespiratory responses were measured using open circuit spirometry and hemodynamic trends were monitored bilaterally at the third lumbar vertebra via near infrared spectroscopy. Significant sex differences ( p<0.05) were observed for the peak values of oxygen uptake (VO(2peak)), ventilation rate (V(E)), oxygen pulse, BV-max and BV-delta. Erector spinae OXY decreased systematically until VO(2peak )was attained, while BV decreased until approximately 50% of VO(2peak) and then leveled off. Stepwise regression analysis indicated that approximately 75% of the variance in VO(2peak )was predicted from cardiorespiratory, hemodynamic and body composition variables, with the most important predictors for absolute and relative VO(2peak )being V(E) ( r=0.75) and fat mass ( r=-0.63) respectively. Inclusion of left side OXY/BV responses increased the predictability of the common variance in VO(2peak )from 40% to 74%, implying that muscle hemodynamics play an important role in determining VO(2peak )during RILL.

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“…Several recent studies (Jensen et al 1999;McGill et al 2000;Yoshitake et al 2001) have used continuous wave NIRS to examine the trends in erector spinae OXY and BV during isometric contractions of the back. The evidence from these studies suggests that NIRS can be used to objectively evaluate low-back muscular endurance and fatigue.…”

Section: Introductionmentioning

confidence: 99%

Reliability of erector spinae oxygenation and blood volume responses using near-infrared spectroscopy in healthy males

Kell

Farag

Bhambhani

2004

European Journal of Applied Physiology

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The purpose of this investigation was to (1). describe the trends in oxygenation (OXY) and blood volume (BV) of the right and left paraspinal muscles during the Biering-Sorensen muscle endurance (BSME) test using near infrared spectroscopy (NIRS), and (2). assess the test-retest reliability of OXY and BV changes during the BSME in healthy males. Seventeen healthy males [age=28.4 (9.8) years, height=1.75 (0.05) m, body mass=82.7 (9.1) kg; mean (SD)] completed two BSME trials within 1 week. NIRS probes were placed bilaterally at lumbar 3. The test was performed with the subject in the prone position using the following protocol: 2 min baseline, BSME, and 4 min recovery. The delta and range values of OXY and BV were used for analysis. Acceptable intra-class correlations were observed for endurance time and all the NIRS variables at the point of fatigue and at each 10% segment of the BSME during the two trials. Bland-Altman plots confirmed the reproducibility of the bilateral NIRS responses of the paravertebral muscles. The BV responses were more reliable than the OXY responses during the two trials. The OXY and BV responses of the paravertebral muscles during static contractions can be measured reliably using NIRS. Future studies should focus primarily on BV for analysis.

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Physiological Response to Submaximal Isometric Contractions of the Paravertebral Muscles

Cited by 53 publications

References 27 publications

Intramuscular pressure, tissue oxygenation and EMG fatigue measured during isometric fatigue-inducing contraction of the multifidus muscle

Intramuscular pressure, tissue oxygenation and EMG fatigue measured during isometric fatigue-inducing contraction of the multifidus muscle

Cardiorespiratory and hemodynamic responses during repetitive incremental lifting and lowering in healthy males and females

Reliability of erector spinae oxygenation and blood volume responses using near-infrared spectroscopy in healthy males

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