Muscle blood flow in response to concentric muscular activity vs. passive venous compression

Zhang, Q.; Andersson, Gunnar; Lindberg, Lars‐Göran; Styf, Jorma

doi:10.1046/j.0001-6772.2003.01215.x

Cited by 12 publications

(9 citation statements)

References 30 publications

(37 reference statements)

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“…The results of the present study may thus be seen in the light of the contracting muscle creating an increase in the pressure difference in the active muscle due to the mechanical effect of the muscle's pumping action and a local vasodilatation. In line with the results of this study, Styf (1990) reported a decrease in IMP following active muscle contractions versus passive venous compression, which Zhang et al (2004) then speculated to cause the greater blood flow during active contractions in their study.…”

Section: Intramuscular Pressure and Muscle Tissue Oxygenationsupporting

confidence: 82%

“…The better oxygenation of the muscle tissue observed during dynamic contractions may then be explained by the mechanisms similar to those of the venous pump in the legs. Zhang et al (2004) investigated the blood flow following concentric muscular activity or passive venous compression and concluded that concentric contractions produced higher blood flow than passive venous compression. The mechanism was explained in terms of the rhythmic muscle contraction repeatedly emptying the veins and facilitating perfusion of the skeletal muscle.…”

Section: Intramuscular Pressure and Muscle Tissue Oxygenationmentioning

confidence: 99%

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Muscle tissue oxygenation, pressure, electrical, and mechanical responses during dynamic and static voluntary contractions

et al. 2004

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Dynamic muscle contractions have been shown to cause greater energy turnover and fatigue than static contractions performed at a corresponding force level. Therefore, we hypothesized that: (1) electro- (EMG) and mechanomyography (MMG), intramuscular pressure (IMP), and reduction in muscle oxygen tension (rTO(2)) would be larger during dynamic (DYN) than intermittent static (IST) low force contractions; and that (2) oxygen tension would remain lower in the resting periods subsequent to DYN as compared to those following IST. Eight subjects performed elbow flexions with identical time-tension products: (1) DYN as a 20 degrees elbow movement of 2 s concentric and 2 s eccentric followed by a 4 s rest; and (2) IST with a 4 s contraction followed by a 4 s rest. Each session was performed for 1 min at 10 and 20% of the maximal voluntary contraction (MVC). The force, bipolar surface EMG, MMG, IMP, rTO(2) were measured simultaneously from the biceps brachii, and the data presented as the mean values together with the standard error of the means. Comparison of the corresponding time periods showed the EMG(rms) and MMG(rms) values to be larger during DYN than IST (concentric phase: DYN vs IST were 14.2 vs 9.4, and 22.0 vs 15.9%(max)-EMG(rms); eccentric phase: in DYN, the MMG was approximately 1.5 and approximately 2.0-fold IST at 10 and 20%MVC, respectively). In contrast, the IMP of the concentric phase in DYN was lower than in IST (2.3 vs 29.5 and 10.9 vs 42.0 mmHg at 10 and 20%MVC, respectively), and a similar picture was seen for the eccentric phase. However, no differences were seen in rTO(2) in either the contraction or the rest periods. In a prolonged rest period (8 s) after the sessions, DYN but not IST showed rTO(2) above baseline level. In conclusion, rTO(2) in DYN and IST were similar in spite of major differences in the MMG and EMG responses of the muscle during contraction periods. This may relate to the surprisingly lower IMP in DYN than IST.

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Section: Intramuscular Pressure and Muscle Tissue Oxygenationsupporting

confidence: 82%

Section: Intramuscular Pressure and Muscle Tissue Oxygenationmentioning

confidence: 99%

Muscle tissue oxygenation, pressure, electrical, and mechanical responses during dynamic and static voluntary contractions

et al. 2004

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“…However, oxygen consumption increased in static compared to dynamic conditions at moderate physical intensity with equivalent muscular effort. This may be explained, at least in part, by a generation of higher intramuscular pressure that may have resulted in impeded blood flow during intermittent static contractions (Sjogaard et al, 2004;Zhang et al, 2004). At 50% MVC, although mean EMG was similar across both exertion types, agonist EMG (a summed measure of EMG from all agonist muscles) was considerably higher during static compared to dynamic exertions.…”

Section: Exertion Type and Physical Demandmentioning

confidence: 95%

Exertion-Dependent Effects of Physical and Mental Workload on Physiological Outcomes and Task Performance

Mehta

Agnew

2013

IIE Transactions on Occupational Ergonomics and Human Factors

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“…The PPGAC signal is synchronous to the heart rate and is directly correlated to pulsatile blood flow [10][11][12]28]. This variation in pulse amplitude for the IR signal over a period of time can be used as a marker to monitor the trend in relative blood flow changes [10][11][12].…”

Section: Processingmentioning

confidence: 99%

“…In this study, the AC portion of the raw IR and RD PPG signals were analysed. This choice is based on the fact that PPGAC is the primary signal of interest in conventional pulse oximetry, dominates the signal-to-noise ratio (SNR), and is directly related to arterial blood flow [10][11][12]28]. PPGAC is thus most affected by any temperature induced change in perfusion.…”

Section: Signal Analysismentioning

confidence: 99%

Analysing the effects of cold, normal, and warm digits on transmittance pulse oximetry

Khan

Pretty

Amies

et al. 2016

Biomedical Signal Processing and Control

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Non-invasive estimation of arterial oxygen saturation (SpO2) and heart rate using pulse oximeters is widely used in hospitals. Pulse oximeters rely on photoplethysmographic (PPG) signals from a peripherally placed optical sensor. However, pulse oximeters can be less accurate if the sensor site is relatively cold. This research investigates the effects on PPG signal quality of local site temperatures for 20 healthy adult volunteers (24.5 ±4.1 years of age). Raw PPG data, composed of Infrared (IR) and Red (RD) signals, was obtained from a transmittance finger probe using a custom pulse oximeter (PO) system. Three tests were performed with the subject's hand surface temperature maintained at baseline (29 ±2°C), cold (19 ±2°C), and warm (33 ±2°C) conditions. Median root mean square (RMS) of PPG signal during the Cold test dropped by 54.0% for IR and 30.6% for RD from the baseline values. In contrast, the PPG RMS increased by 64.4% and 60.2% for RD and IR, respectively, during the Warm test. Mean PPG pulse amplitudes decreased by 59.5% for IR and 46.1% for RD in the cold test when compared to baseline, but improved by 70.1% for IR and 59.0% for RD in the warm test. This improvement of up to 4x in signal quality during the warm condition was associated with a closer match (median difference of 1.5%) between the SpO2 values estimated by the PO system and a commercial pulse oximeter. The differences measured in RMS and mean amplitudes for the three tests were statistically significant (p < 0.001). Overall, warm temperatures significantly improve PPG signal quality and SpO2 estimation accuracy. Sensor site temperature is recommended to be maintained near 33°C for reliable transmittance pulse oximetry.

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Muscle blood flow in response to concentric muscular activity vs. passive venous compression

Abstract: We conclude that concentric muscular activity produces higher MBF values than passive venous compression.

Cited by 12 publications

References 30 publications

Muscle tissue oxygenation, pressure, electrical, and mechanical responses during dynamic and static voluntary contractions

Muscle tissue oxygenation, pressure, electrical, and mechanical responses during dynamic and static voluntary contractions

Exertion-Dependent Effects of Physical and Mental Workload on Physiological Outcomes and Task Performance

Analysing the effects of cold, normal, and warm digits on transmittance pulse oximetry

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