Estimation of the lactate threshold using an electro acoustic sensor system analysing the respiratory air.

Abstract:

:The lactate threshold is used by athletes to optimise the intensity during exercise. It is of interest to measure the threshold on the very day and during the present sport activity. Steady state ergometer tests have been performed on 40 individuals to compare the threshold found by an electro acoustic sensor system to the lactate threshold established by blood analyses evaluated with the Dmax method. The correlation coefficient between the threshold found by the sensor system and the one established by blood analyses regarding workload (Watt), heart rate (beats/min), and lactate level (mmol lactate/l blood) at the thresholds were 0.87 (p < 0.001), 0.74 (p < 0.001), and 0.65 (p < 0.001), respectively. The findings in this study indicates that the thresholds of individuals measured by the sensor system show good correlations to the threshold established with the Dmax method from lactate levels in blood samples.

journal_name

Med Biol Eng Comput

authors

Folke M

doi

10.1007/s11517-008-0373-4

subject

Has Abstract

pub_date

2008-09-01 00:00:00

pages

939-42

issue

9

eissn

0140-0118

issn

1741-0444

journal_volume

46

pub_type

杂志文章
  • Fluctuation analysis of respiratory impedance waveform in asthmatic patients: effect of airway obstruction.

    abstract::Fluctuation analysis has great potential to contribute to pulmonary clinical science and practice. We evaluated the relationship between asthma and the respiratory impedance recurrence period density entropy (RPDEnZrs) and the variability (SDZrs). A non-invasive and simple protocol for assessing respiratory mechanics ...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-012-0957-x

    authors: Veiga J,Lopes AJ,Jansen JM,Melo PL

    更新日期:2012-12-01 00:00:00

  • Internal work estimation in three-dimensional gait analysis.

    abstract::Many studies concerning the internal work of human motion have used two-dimensional kinematic models to estimate kinetic energy of the segments. The generalised co-ordinate concept has been applied here to a simultaneous and bilateral gait analysis. A three-dimensional kinematic model based on quaternions has been dev...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02523852

    authors: Aissaoui R,Allard P,Junqua A,Frossard L,Duhaime M

    更新日期:1996-11-01 00:00:00

  • Estimation of dynamic metabolic activity in micro-tissue cultures from sensor recordings with an FEM model.

    abstract::We estimated the dynamic cell metabolic activity and the distribution of the pH value and oxygen concentration in tissue samples cultured in vitro by using real-time sensor records and a numerical simulation of the underlying reaction-diffusion processes. As an experimental tissue model, we used chicken spleen slices....

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-015-1367-7

    authors: Pfister C,Forstmeier C,Biedermann J,Schermuly J,Demmel F,Wolf P,Kaspers B,Brischwein M

    更新日期:2016-05-01 00:00:00

  • Computer-controlled positive displacement pump for physiological flow simulation.

    abstract::A computer-controlled pump for use both in the study of vascular haemodynamics and in the calibration of clinical devices which measure blood flow is designed. The novel design of this pump incorporates two rack-mounted pistons, driven into opposing cylinders by a micro-stepping motor. This approach allows the product...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02446086

    authors: Holdsworth DW,Rickey DW,Drangova M,Miller DJ,Fenster A

    更新日期:1991-11-01 00:00:00

  • Analysis of biomechanical changes after removal of instrumentation in lumbar arthrodesis by finite element analysis.

    abstract::The purpose of this study is to investigate the change in biomechanical milieu following removal of pedicle screws in instrumented single level lumbar arthrodesis. Using a validated finite element (FE) model of the intact lumbar spine (L2-5), two scenarios of L3-4 lumbar fusion were simulated: posterolateral fusion (P...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-010-0621-2

    authors: Kim HJ,Chun HJ,Moon SH,Kang KT,Kim HS,Park JO,Moon ES,Sohn JS,Lee HM

    更新日期:2010-07-01 00:00:00

  • Comparison between human awake, meditation and drowsiness EEG activities based on directed transfer function and MVDR coherence methods.

    abstract::This study examined the electroencephalogram functional connectivity (coherence) and effective connectivity (flow of information) of selected brain regions during three different attentive states: awake, meditation and drowsiness. For the estimation of functional connectivity (coherence), Welch and minimum variance di...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-015-1272-0

    authors: Dissanayaka C,Ben-Simon E,Gruberger M,Maron-Katz A,Sharon H,Hendler T,Cvetkovic D

    更新日期:2015-07-01 00:00:00

  • Classification of basic daily movements using a triaxial accelerometer.

    abstract::A generic framework for the automated classification of human movements using an accelerometry monitoring system is introduced. The framework was structured around a binary decision tree in which movements were divided into classes and subclasses at different hierarchical levels. General distinctions between movements...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02347551

    authors: Mathie MJ,Celler BG,Lovell NH,Coster AC

    更新日期:2004-09-01 00:00:00

  • Chaotic behavior of the coronary circulation.

    abstract::The regulation of the coronary circulation is a complex paradigm in which many inputs that influence vasomotor tone have to be integrated to provide the coronary vasomotor adjustments to cardiac metabolism and to perfusion pressure. We hypothesized that the integration of many disparate signals that influence membrane...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-008-0329-8

    authors: Trzeciakowski J,Chilian WM

    更新日期:2008-05-01 00:00:00

  • Computerised volumetric analysis of lesions in multiple sclerosis using new semi-automatic segmentation software.

    abstract::The paper describes the application of new semi-automatic segmentation software to the task of detection of anatomical structures and lesion and their three-dimensional (3D) visualisation in 23 patients with secondary progressive multiple sclerosis (MS). The purpose is to study the correlation between magnetic resonan...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02513274

    authors: Dastidar P,Heinonen T,Vahvelainen T,Elovaara I,Eskola H

    更新日期:1999-01-01 00:00:00

  • Multi-parametric study of temperature and thermal damage of tumor exposed to high-frequency nanosecond-pulsed electric fields based on finite element simulation.

    abstract::High-frequency nanosecond-pulsed electric fields were recently introduced for tumor or abnormal tissue ablation to solve some problems of conventional electroporation. However, it is necessary to study the thermal effects of high-field-intensity nanosecond pulses inside tissues. The multi-parametric analysis performed...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-016-1589-3

    authors: Mi Y,Rui S,Li C,Yao C,Xu J,Bian C,Tang X

    更新日期:2017-07-01 00:00:00

  • Estimation of the dynamics of event-related desynchronisation changes in electroencephalograms.

    abstract::A method for the estimation of medium rate transitions of non-stationary electroencephalograms (EEG) is proposed. The method is applicable to such EEG dynamics that are between (a) fast transitions for which segmentation procedures are used and (b) slow transitions for which adaptive filters work properly. The estimat...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02513305

    authors: Hiltunen JK,Karjalainen PA,Partanen J,Kaipio JP

    更新日期:1999-05-01 00:00:00

  • Dynamic cerebral autoregulation: different signal processing methods without influence on results and reproducibility.

    abstract::Cerebral autoregulation controls cerebral blood flow under changing cerebral perfusion pressure. Standards for measurement and analysis of dynamic cerebral autoregulation (dCA) are lacking. In this study, dCA reproducibility, quantified by intraclass correlation coefficient, is evaluated for different methodological a...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-010-0706-y

    authors: Gommer ED,Shijaku E,Mess WH,Reulen JP

    更新日期:2010-12-01 00:00:00

  • Extraction of Cole parameters from the electrical bioimpedance spectrum using stochastic optimization algorithms.

    abstract::Fitting the measured bioimpedance spectroscopy (BIS) data to the Cole model and then extracting the Cole parameters is a common practice in BIS applications. The extracted Cole parameters then can be analysed as descriptors of tissue electrical properties. To have a better evaluation of physiological or pathological p...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-015-1355-y

    authors: Gholami-Boroujeny S,Bolic M

    更新日期:2016-04-01 00:00:00

  • Photoplethysmography. Part 2. Influence of light source wavelength.

    abstract::When the microvascular blood perfusion in human skin is measured by photoplethysmography (PPG), infra-red light (800-960 nm) is normally used as the light source. The PPG signal, which consists of a pulsatile (AC) and a slowly fluctuating (DC) component, was studied at different optical wavelengths utilising optical f...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02446295

    authors: Lindberg LG,Oberg PA

    更新日期:1991-01-01 00:00:00

  • Determining appropriate models for joint control using surface electrical stimulation of soleus in spinal cord injury.

    abstract::The mechanical impedance of the ankle joint during electrical stimulation of the soleus is studied by applying constant-velocity 10 degrees angular perturbations to the ankle and measuring the resultant torque. Both neurologically intact subjects and spinal cord injured subjects are tested. Lumped, piecewise linear mo...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02512522

    authors: Flaherty B,Robinson C,Agarwal G

    更新日期:1994-05-01 00:00:00

  • Experimental and numerical investigation on soft tissue dynamic response due to turbulence-induced arterial vibration.

    abstract::Peripheral arterial occlusive disease is a serious cardiovascular disorder. The arterial occlusion leads to turbulent flow and arterial sound generation on the inner vessel wall. Stenosis-induced vibro-acoustic waves propagate through the surrounding soft tissues and reach the skin surface. In this study, the feasibil...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-019-01995-y

    authors: Salman HE,Yazicioglu Y

    更新日期:2019-08-01 00:00:00

  • ECG signal analysis for the assessment of sleep-disordered breathing and sleep pattern.

    abstract::The diagnosis of sleep-disordered breathing (SDB) usually relies on the analysis of complex polysomnographic measurements performed in specialized sleep centers. Automatic signal analysis is a promising approach to reduce the diagnostic effort. This paper addresses SDB and sleep assessment solely based on the analysis...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-011-0853-9

    authors: Kesper K,Canisius S,Penzel T,Ploch T,Cassel W

    更新日期:2012-02-01 00:00:00

  • Thermal distribution analysis of three-dimensional tumor-embedded breast models with different breast density compositions.

    abstract::Breast cancer is the most common cancer among women globally, and the number of young women diagnosed with this disease is gradually increasing over the years. Mammography is the current gold-standard technique although it is known to be less sensitive in detecting tumors in woman with dense breast tissue. Detecting a...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-015-1403-7

    authors: Wahab AA,Salim MI,Ahamat MA,Manaf NA,Yunus J,Lai KW

    更新日期:2016-09-01 00:00:00

  • Sub-threshold depolarizing pre-pulses can enhance the efficiency of biphasic stimuli in transcutaneous neuromuscular electrical stimulation.

    abstract::There is multiple evidence in the literature that a sub-threshold pre-pulse, delivered immediately prior to an electrical stimulation pulse, can alter the activation threshold of nerve fibers and motor unit recruitment characteristics. So far, previously published works combined monophasic stimuli with sub-threshold d...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-018-1851-y

    authors: Vargas Luna JL,Mayr W,Cortés-Ramirez JA

    更新日期:2018-12-01 00:00:00

  • Dialysate-side urea kinetics. Neural network predicts dialysis dose during dialysis.

    abstract::Determination of the adequacy of dialysis is a routine but crucial procedure in patient evaluation. The total dialysis dose, expressed as Kt/V, has been widely recognised to be a major determinant of morbidity and mortality in haemodialysed patients. Many different factors influence the correct determination of Kt/V, ...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02348080

    authors: Fernández EA,Valtuille R,Willshaw P,Perazzo CA

    更新日期:2003-07-01 00:00:00

  • CT analysis of the use of the electrical impedance technique to estimate local oedema in the extremities in patients with lymphatic obstruction.

    abstract::The aim of the study is to establish the validity of the use of the electrical impedance technique for estimating local oedema in extremities through comparison with computed-tomography (CT) analysis. Eight healthy women (group 1) and nine women with unilateral leg oedema following chronic lymphatic obstruction (group...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02522859

    authors: Watanabe R,Kotoura H,Morishita Y

    更新日期:1998-01-01 00:00:00

  • Classification of pure conduct disorder from healthy controls based on indices of brain networks during resting state.

    abstract::Conduct disorder (CD) is an important mental health problem in childhood and adolescence. There is presently a trend of revealing neural mechanisms using measures of brain networks. This study goes further by presenting a classification scheme to distinguish subjects with CD from typically developing healthy subjects ...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-020-02215-8

    authors: Zhang J,Liu Y,Luo R,Du Z,Lu F,Yuan Z,Zhou J,Li S

    更新日期:2020-09-01 00:00:00

  • Visualisation method of spatial interictal discharges in temporal epilepsy patients using magneto-encephalogram.

    abstract::The aim of the study was to develop a method for investigating how interictal epileptic discharges in temporal epilepsy patients are activated spatially. The activity was measured using magneto-encephalography (MEG). The MEG data were used to produce a current-arrow map that reflected the topographic distribution of t...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02344215

    authors: Kandori A,Oe H,Miyashita K,Date H,Yamada N,Naritomi H,Chiba Y,Murakami M,Miyashita T,Tsukada K

    更新日期:2002-05-01 00:00:00

  • Sensitivity of hip tissues contact evaluation to the methods used for estimating the hip joint center of rotation.

    abstract::Computer-based simulations of human hip joints generally include investigating contacts happening among soft or hard tissues during hip movement. In many cases, hip movement is approximated as rotation about an estimated hip center. In this paper, we investigate the effect of different methods used for estimating hip ...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-012-0873-0

    authors: Arbabi E,Schmid J,Boulic R,Thalmann D,Magnenat-Thalmann N

    更新日期:2012-06-01 00:00:00

  • Dynamic thermographic imaging method for quantifying dermal perfusion: potential and limitations.

    abstract::A new method of quantifying dermal perfusion on a regional basis using a dynamic thermographic technique is investigated. The technique is based on the relationship between dermal perfusion and the rate of skin surface reheating following the application of a transient cold challenge predicted by a theoretical model. ...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02441468

    authors: Wilson SB,Spence VA

    更新日期:1989-09-01 00:00:00

  • Influence of gestational age, heart rate, gender and time of day on fetal heart rate variability.

    abstract::From adult data, it is known that numerous factors, such as age, state of the autonomic nervous system, diurnal rhythms or mean R-R interval mRR, influence heart rate variability (HRV). The aim of this study was the examination of the influence of gestational age, mRR, gender and time of day on fetal HRV. The analysis...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02344729

    authors: Lange S,Van Leeuwen P,Geue D,Hatzmann W,Grönemeyer D

    更新日期:2005-07-01 00:00:00

  • Contact mechanics of a thin-walled capsule adhered onto a rigid planar substrate.

    abstract::A thin-walled capsule, modelled as an incompressible liquid droplet contained in a thin flexible membrane, was allowed to adhere onto a rigid substrate. The contact mechanics were formulated, based on linear elasticity, to portray quantitatively the relationships between osmotic inflation, contact area and angle, memb...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02345154

    authors: Wan KT,Liu KK

    更新日期:2001-09-01 00:00:00

  • Analysis and decomposition of signals obtained by thigh-fixed uni-axial accelerometry during normal walking.

    abstract::The use of piezo-resistive uni-axial accelerometer signals in gait analysis is complicated by the fact that the measured signal is composed of different types of acceleration. The aim of the study is to obtain insight into the signal from a tangential accelerometer attached to the thigh during walking. Six subjects wa...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/BF02344868

    authors: Bussmann JB,Damen L,Stam HJ

    更新日期:2000-11-01 00:00:00

  • Ultrasonic characterization of ultrasound contrast agents.

    abstract::The main constituent of an ultrasound contrast agent (UCA) is gas-filled microbubbles. An average UCA contains billions per ml. These microbubbles are excellent ultrasound scatterers due to their high compressibility. In an ultrasound field they act as resonant systems, resulting in harmonic energy in the backscattere...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-009-0497-1

    authors: de Jong N,Emmer M,van Wamel A,Versluis M

    更新日期:2009-08-01 00:00:00

  • Pulse transit time based respiratory rate estimation with singular spectrum analysis.

    abstract::Respiratory rate (RR) is an important vital sign which can be difficult to measure accurately and unobtrusively in routine clinical practice. Pulse transit time (PTT), on the other hand, is unobtrusive to collect from electrocardiogram (ECG) and photoplethysmogram (PPG) signals. Using PTT is a novel method to estimate...

    journal_title:Medical & biological engineering & computing

    pub_type: 杂志文章

    doi:10.1007/s11517-019-02088-6

    authors: Ding X,Yan BP,Karlen W,Zhang YT,Tsang HK

    更新日期:2020-02-01 00:00:00