Anaerobic Threshold Determination With Analysis of Salivary Amylase

1997 ◽  
Vol 22 (6) ◽  
pp. 553-561 ◽  
Author(s):  
Felipe Calvo ◽  
José L. Chicharro ◽  
Fernando Bandrés ◽  
Alejandro Lucía ◽  
Margarita Pérez ◽  
...  
Keyword(s):  
Heart Rate ◽  
Key Words ◽  
Anaerobic Threshold ◽  
Exercise Test ◽  
Capillary Blood ◽  
Salivary Amylase ◽  
Continuous Increase ◽  
Laboratory Exercise ◽  
Significant Difference

The purpose of this study was to determine the anaerobic threshold from analysis of amylase concentration in total saliva during a laboratory exercise test. Each of 20 healthy young men performed both a submaximal and a maximal test on a treadmill. During the submaximal test, capillary blood and total saliva samples were collected for determination of anaerobic threshold (AT) and saliva threshold (Tsa), respectively. Tsa was defined as the point at which the first continuous increase in amylase concentration occurred during exercise. The results showed no significant difference between values of AT and Tsa when both were expressed either as running velocity or as heart rate. In addition, there existed a high correlation between AT and Tsa (r = .93, p < .001). It was therefore concluded that the analysis of amylase concentration in total saliva during exercise might be used as a valid new method for determining AT. Key words: exercise, anaerobic threshold, saliva

DETERMINING AMMONIUM OXALATE-EXTRACTABLE Si IN SOILS

1986 ◽  
Vol 66 (4) ◽  
pp. 751-755 ◽  
Author(s):  
C. WANG ◽  
P. A. SCHUPPLI
Keyword(s):  
Atomic Absorption ◽  
Key Words ◽  
Podzolic Soil ◽  
Ammonium Oxalate ◽  
Podzolic Soils ◽  
Significant Difference ◽  
Key Words Oxalate

Determination of oxalate-extractable Si and Al is useful in assessing the degree of accumulation of allophane-like materials in Podzolic soils. Three procedures were tested for determining Si: manual spectrophotometry, automated spectrophotometry and atomic absorption. For concentrations of oxalate-extractable Si above 0.5 g kg−1, there was no significant difference among results by the three procedures. For lower concentrations of Si, results by atomic absorption were higher than those by the spectrophotometric procedures. Determination by Si by autoanalyzer is the preferred procedure as it is convenient, sensitive and reliable. Key words: Oxalate Si, Podzolic soil, autoanalyzer

Determination of the anaerobic threshold by a noninvasive field test in runners

1982 ◽  
Vol 52 (4) ◽  
pp. 869-873 ◽  
Author(s):  
F. Conconi ◽  
M. Ferrari ◽  
P. G. Ziglio ◽  
P. Droghetti ◽  
L. Codeca
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Field Test ◽  
Anaerobic Threshold ◽  
Initial Velocity ◽  
Running Speed ◽  
The Relationship

The relationship between running speed (RS) and heart rate (HR) was determined in 210 runners. On a 400-m track the athletes ran continuously from an initial velocity of 12–14 km/h to submaximal velocities varying according to the athlete's capability. The HRs were determined through ECG. In all athletes examined, a deflection from the expected linearity of the RS-HR relationship was observed at submaximal RS. The test-retest correlation for the velocities at which this deflection from linearity occurred (Vd) determined in 26 athletes was 0.99. The velocity at the anaerobic threshold (AT), established by means of blood lactate measurements, and Vd were coincident in 10 runners. The correlation between Vd and average running speed (mean RS) in competition was 0.93 in the 5,000 m (mean Vd = 19.13 +/- 1.08 km/h; mean RS = 20.25 +/- 1.15 km/h), 0.95 in the marathon (mean Vd = 18.85 +/- 1.15 km/h; mean RS = 17.40 +/- 1.14 km/h), and 0.99 in the 1-h race (mean Vd = 18.70 +/- 0.98 km/h; mean RS = 18.65 +/- 0.92 km/h), thus showing that AT is critical in determining the running pace in aerobic competitive events.

scholarly journals Prognostic power of anaerobic threshold parameters in patients with transposition of the great arteries and systemic right ventricle

2019 ◽  
Vol 29 (12) ◽  
pp. 1445-1451
Author(s):  
António V. Gonçalves ◽  
Tânia Mano ◽  
Ana Agapito ◽  
Sílvia A. Rosa ◽  
Lídia de Sousa ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Right Ventricle ◽  
Anaerobic Threshold ◽  
Exercise Test ◽  
Area Under The Curve ◽  
Systemic Circulation ◽  
Cardiopulmonary Exercise Test ◽  
Cardiopulmonary Exercise ◽  
Test Parameters

AbstractIntroduction:Both transposition of the great arteries (TGA) previously submitted to a Senning/Mustard procedure and congenitally corrected TGA (cc-TGA) have the systemic circulation supported by the morphological right ventricle, thereby rendering these patients to heart failure events risk. The aim of this study was to evaluate cardiopulmonary exercise test parameters for stratifying the risk of heart failure events in TGA patients.Methods:Retrospective evaluation of adult TGA patients with systemic circulation supported by the morphological right ventricle submitted to cardiopulmonary exercise test in a tertiary centre. Patients were followed up for at least 1 year for the primary endpoint of cardiac death or heart failure hospitalisation. Several cardiopulmonary exercise test parameters were analysed as potential predictors of the combined endpoint and their predictive power were compared (area under the curve).Results:Cardiopulmonary exercise test was performed in 44 TGA patients (8 cc-TGA), with a mean age of 35.1 ± 8.4 years. The primary endpoint was reached by 10 (22.7%) patients, with a mean follow-up of 36.7 ± 26.8 months. Heart rate at anaerobic threshold had the highest area under the curve value (0.864), followed by peak oxygen consumption (pVO2) (0.838). Heart rate at anaerobic threshold ≤95 bpm and pVO2 ≤20 ml/kg/min had a sensitivity of 87.5 and 80.0% and a specificity of 82.4 and 76.5%, respectively, for the primary outcome.Conclusion:Heart rate at anaerobic threshold ≤95 bpm had the highest predictive power of all cardiopulmonary exercise test parameters analysed for heart failure events in TGA patients with systemic circulation supported by the morphological right ventricle.

scholarly journals Determination of anaerobic threshold through heart rate and near infrared spectroscopy in elderly healthy men

2013 ◽  
Vol 17 (5) ◽  
pp. 506-515 ◽  
Author(s):  
Michel S. Reis ◽  
Danilo C. Berton ◽  
Ross Arena ◽  
Aparecida M. Catai ◽  
Jose A. Neder ◽  
...  
Keyword(s):  
Heart Rate ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Anaerobic Threshold ◽  
Near Infrared ◽  
Healthy Men

A Method for the Evaluation of Anaerobic Threshold Based on Heart Rate Dynamics during Incremental Exercise Test and Recovery

2019 ◽  
Vol 45 (2) ◽  
pp. 180-187
Author(s):  
A. V. Kozlov ◽  
A. V. Yakushkin ◽  
R. S. Andreev ◽  
A. V. Vavaev ◽  
R. V. Yurikov ◽  
...  
Keyword(s):  
Heart Rate ◽  
Anaerobic Threshold ◽  
Exercise Test ◽  
Incremental Exercise ◽  
Incremental Exercise Test ◽  
Heart Rate Dynamics

Reproducibility of Heart Rate Variability Threshold in Untrained Individuals

2018 ◽  
Vol 40 (02) ◽  
pp. 95-99 ◽  
Author(s):  
Fabiula Novelli ◽  
Jaqueline de Araújo ◽  
Geovane Tolazzi ◽  
Gabriel Tricot ◽  
Gisela Arsa ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Exercise Test ◽  
Perceived Exertion ◽  
Intraclass Correlation ◽  
Physical Effort ◽  
Incremental Exercise Test ◽  
Significant Difference ◽  
High Intraclass Correlation Coefficient ◽  
Cardiac Modulation

AbstractThe aim of this study was to evaluate the reproducibility of the heart rate variability threshold (HRVT) by different HRV indexes and determination criteria. 68 untrained participants, 17 women (24.09±4.91 years old; 21.54±1.97 kg∙m−2) and 51 men (24.52±3.52 years old; 26.51±6.31 kg∙m−2), were evaluated on 2 different days (test and retest). The HRVT was determined during an incremental exercise test using 2 indexes (SD1 and RMSSD) and criteria (HRTV1, first intensity of physical effort with index<3 ms, and HRVT2, first intensity of physical effort, in which the index presents a difference<1 ms between 2 consecutive intensities). There was no significant difference (p<0.05) between the test and retest for any of the variables evaluated. All variables, except for the rate of perceived exertion at HRVT2, presented moderate to high intraclass correlation coefficient (HRVT1: 0.55–0.85 and HRVT2:0.58–0.69). All variables at HRVT1 and the heart rate at HRVT2 showed coefficient of variation ~ 10%. The HRVT, regardless of criteria and HRV index used, showed satisfactory reproducibility. Thus, these criteria can be used to assess clinically autonomic cardiac modulation and aerobic capacity, and to analyze the effect of different interventions.

scholarly journals Differences in cardiorespiratory responses of young and senior male endurance athletes to maximal graded exercise test

2020 ◽  
Vol 107 (3) ◽  
pp. 444-454
Author(s):  
M. Michalis ◽  
K.J. Finn ◽  
R. Podstawski ◽  
S. Gabnai ◽  
Á. Koller ◽  
...  
Keyword(s):  
Anaerobic Threshold ◽  
Exercise Test ◽  
Power Output ◽  
Submaximal Exercise ◽  
Incremental Exercise ◽  
Maximal Heart Rate ◽  
Young Athletes ◽  
Exercise Economy ◽  
Significant Difference ◽  
Male Subjects

AbstractWithin recent years the popularity of sportive activities amongst older people, particularly competitive activities within certain age groups has increased. The purpose of this study was to assess the differences in the cardiorespiratory output at anaerobic threshold and at maximal power, output during an incremental exercise, among senior and young athletes. Ten elderly male subjects [mean (SD) age: 68.45 ± 9.32 years] and eight young male subjects [mean (SD) age: 25.87 ± 5.87 years] performed an incremental exercise test on a treadmill ergometer. No significant differences in body size were evident; however, the differences between the groups for peak power (451.62 ± 49 vs. 172.4 ± 32.2 W), aerobic capacity (57.97 ± 7.5 vs. 40.36 ± 8.6 mL kg−1 min−1), maximal heart rate (190.87 ± 9.2 vs. 158.5 ± 9.1 beats min−1), peak blood lactate (11 ± 1.7 vs. 7.3 ± 1.4 mmol L−1), and % VO2max at ventilatory thresholds (93.18 ± 4.3 vs. 79.29 ± 9.9%) were significantly lower in the senior athletes. The power output at anaerobic threshold was also higher (392 ± 48 vs. 151 ± 23 W) in the young athletes, explaining the significant difference in terms of performance between these groups. We have observed an evident deterioration in some of the cardiovascular parameters; however, the submaximal exercise economy seems to be preserved with aging. Exercise economy (i.e. metabolic cost of sustained submaximal exercise) was not different considerably with age in endurance-trained adults.

Noninvasive Determination of Anaerobic Threshold Based on the Heart Rate Deflection Point in Water Cycling

2016 ◽  
Vol 30 (2) ◽  
pp. 518-524 ◽  
Author(s):  
Stephanie S. Pinto ◽  
Roxana M. Brasil ◽  
Cristine L. Alberton ◽  
Hector K. Ferreira ◽  
Natália C. Bagatini ◽  
...  
Keyword(s):  
Heart Rate ◽  
Anaerobic Threshold ◽  
Water Cycling

scholarly journals The Correlations between Admission Heart Rate and Corrected QT Interval Prolongations with Coronary Artery Disease in Patients with Acute Coronary Syndrome

2021 ◽  
pp. 13-21
Author(s):  
Shaimaa Mohamed Amer Abo Elnoaas ◽  
Raghda Ghonimy El Sheikh ◽  
Mohamed Ahmed Abd Elaal ◽  
Ayman Ahmed El Sheikh
Keyword(s):  
Coronary Artery Disease ◽  
Heart Rate ◽  
Acute Coronary Syndrome ◽  
Coronary Artery ◽  
Baseline Heart Rate ◽  
Qtc Interval ◽  
Continuous Increase ◽  
Coronary Syndrome ◽  
Significant Difference ◽  
Artery Disease

Background: Coronary heart disease is a major cause of mortality and this health problem is reaching pandemic in both developed, and developing countries. ACS carries significant morbidity and mortality and the prompt diagnosis, and appropriate treatment is essential. HR was identified as a risk predictor of ACS. Both continuous increase in high baseline heart rate and decrease in low baseline heart rate are associated with higher risk of CVD. Decreased heart rate could also cause dispersion of atrial repolarization which, in turn, initiate cardiovascular events. Aim: The aim of this study was to assess the correlation between heart rate and severity of coronary artery disease in patient with acute coronary syndrome. Patients and Methods: The retrospective study was conducted on 120 patients that fulfilled the inclusion criteria were recruited from Cardiology department in Tanta university hospitals presented with acute coronary syndrome. Results: There was highly significant difference between both groups regarding admission heart rate & QTc interval. Both groups of low AHR< 60 bpm & high AHR >90bpm were significantly associated with severe CAD &.Mainly those patients with higher admission heart rate were more likely to have higher Syntax scores (severe coronary lesion). Also, patients with prolonged QTc had severe coronary artery diseases, higher SS & high probability to suffer adverse cardiac events more than patients without prolonged QTc interval. Conclusion: The current study showed that QTc interval prolongation and admission HR are independent predictors of the severity of coronary artery disease in patients with acute coronary syndrome.

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