NON-INVASIVE ESTIMATION OF THE LACTATE THRESHOLD FROM HEART RATE RESPONSE TO SUBMAXIMAL EXERCISE

1992 ◽  
Vol 24 (Supplement) ◽  
pp. S166
Author(s):  
J. C. Gonzalez ◽  
A. Oliveira ◽  
F. Cheaello ◽  
E. Grassi ◽  
J. P. Hiboiro
Keyword(s):  
Heart Rate ◽  
Lactate Threshold ◽  
Heart Rate Response ◽  
Submaximal Exercise ◽  
Non Invasive

Differences in heart rate response at feeding between stall housed and group housed sows

1993 ◽  
Vol 1993 ◽  
pp. 17-17
Author(s):  
J.N. Marchant ◽  
A.R.Rudd
Keyword(s):  
Heart Rate ◽  
Small Groups ◽  
Heart Rate Response ◽  
Housing Conditions ◽  
Farm Animal Welfare ◽  
Heart Rate Monitor ◽  
Heart Rate Monitors ◽  
Non Invasive ◽  
Applied Physiology ◽  
Improved Technology

The scientific assessment of farm animal welfare requires an amalgam of different measures of both physiology and behaviour. Behavioural measures are relatively easy to obtain but non-invasive measures of internal physiology are somewhat harder to achieve. An increase in the use of applied physiology in training regimes of human athletes, has led to an improved technology of heart rate monitors, making the measurement of heart rates painless and easy to record.The objective of this experiment was to use a human heart rate monitor to investigate differences in heart rate response at feeding between sows housed in three different dry sow housing conditions. Schouten et al (1991) have demonstrated differences in heart rate response at feeding between loose-housed and tethered sows. In the study reported here, stall-housed sows were compared with sows housed in small groups and sows housed in a large group with an Electronic Feeder System (EFS).

scholarly journals Dynamic Modelling of Heart Rate Response Under Different Exercise Intensity

2010 ◽  
Vol 4 (1) ◽  
pp. 81-85 ◽  
Author(s):  
Steven W Su ◽  
Weidong Chen ◽  
Dongdong Liu ◽  
Yi Fang ◽  
Weijun Kuang ◽  
...  
Keyword(s):  
Heart Rate ◽  
Time Constant ◽  
Heart Rate Response ◽  
Cardiovascular Response ◽  
Dynamic Modelling ◽  
Healthy Male Subject ◽  
Step Response ◽  
Rate Variation ◽  
Response Dynamics ◽  
Non Invasive

Heart rate is one of the major indications of human cardiovascular response to exercises. This study investigates human heart rate response dynamics to moderate exercise. A healthy male subject has been asked to walk on a motorised treadmill under a predefined exercise protocol. ECG, body movements, and oxygen saturation (SpO2) have been reliably monitored and recorded by using non-invasive portable sensors. To reduce heart rate variation caused by the influence of various internal or external factors, the designed step response protocol has been repeated three times. Experimental results show that both steady state gain and time constant of heart rate response are not invariant when walking speed is faster than 3 miles/hour, and time constant of offset exercise is noticeably longer than that of onset exercise.

Heart Rate Response to Submaximal Exercise: Relation to Age and Sex

1968 ◽  
Vol 23 (2) ◽  
pp. 127-133 ◽  
Author(s):  
H. J. Montoye ◽  
P. W. Willis ◽  
D. A. Cunningham
Keyword(s):  
Heart Rate ◽  
Heart Rate Response ◽  
Submaximal Exercise ◽  
Age And Sex

Abstract P236: The Heritability of Submaximal Exercise Heart Rate Response to Regular Exercise is Accounted for by Nine SNPs

Circulation ◽  
2012 ◽  
Vol 125 (suppl_10) ◽  
Author(s):  
Tuomo Rankinen ◽  
Yun Ju Sung ◽  
Mark Sarzynski ◽  
Treva K Rice ◽  
DC Rao ◽  
...  
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Endurance Training ◽  
Heart Rate Response ◽  
Family Study ◽  
Significant Snps ◽  
Submaximal Exercise ◽  
Regular Physical Activity ◽  
Physical Work ◽  
Exercise Heart Rate

Regular physical activity is the most effective non-pharmacological strategy to lower heart rate both at rest and during submaximal physical work. We have previously shown that endurance training-induced changes in heart rate are heritable (h 2 =0.34). However, few genes associated with heart rate training responses have been identified. The purpose of this study was to perform a genome-wide association study (GWAS) to uncover DNA sequence variants associated with submaximal exercise heart rate training responses in the HERITAGE Family Study. Heart rate was measured during steady-state exercise at 50 Watts (HR50) on two separate days both before and after a 20-week endurance training program in 473 white subjects from 99 families. Illumina HumanCNV370-Quad v3.0 BeadChips were genotyped using Illumina BeadStation 500GX platform. After quality control procedures, 320,000 single-nucleotide polymorphisms (SNPs) were available for the GWAS analyses. Associations between HR50 training response (ΔHR50) and the SNPs were tested using the MERLIN software package (single-SNP analyses) and standard regression models (multivariate analyses). Furthermore, conditional heritability analysis (MERLIN) was used to test the contribution of the most significant SNPs to the heritability of ΔHR50. Exercise training induced an average reduction of 11 bpm in HR50 (SD = 9.9 bpm, p<0.0001), while individual training responses ranged from a 12 bpm increase to a 42 bpm decrease. The strongest associations for ΔHR50 (adjusted for age, sex, BMI and baseline HR50) were detected with SNPs at the YWHAQ locus on chromosome 2p25 (p=8.1x10 -7 ), RBPMS locus on 8p12 (p=3.8x10 -6 ) and CREB1 locus on 2q34 (p=1.6x10 -5 ). In addition, 37 other SNPs showed p-values < 9.9x10 -5 . After removing redundant SNPs, the ten most significant SNPs explained 35.9% of the ΔHR50 variance in a multivariate regression model. Conditional heritability test showed that nine of these SNPs (all intragenic) accounted for 100% of the ΔHR50 heritability. Our results indicate that SNPs in nine genes related to cardiomyocyte and neuronal functions as well as cardiac memory formation fully account for the heritability of submaximal exercise heart rate response to regular physical activity in the HERITAGE Family Study.

scholarly journals Advances of the reverse lactate threshold test: Non-invasive proposal based on heart rate and effect of previous cycling experience

PLoS ONE ◽  
2018 ◽  
Vol 13 (3) ◽  
pp. e0194313 ◽  
Author(s):  
Leonardo Henrique Dalcheco Messias ◽  
Emanuel Elias Camolese Polisel ◽  
Fúlvia Barros Manchado-Gobatto
Keyword(s):  
Heart Rate ◽  
Lactate Threshold ◽  
Threshold Test ◽  
Non Invasive

Effects of Varying Levels of Hypohydration on Ratings of Perceived Exertion

1993 ◽  
Vol 3 (4) ◽  
pp. 376-386 ◽  
Author(s):  
Donald R. Dengel ◽  
Peter G. Weyand ◽  
Donna M. Black ◽  
Kirk J. Cureton
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Lactate Threshold ◽  
Perceived Exertion ◽  
Fluid Intake ◽  
Ventilatory Threshold ◽  
Submaximal Exercise ◽  
Ratings Of Perceived Exertion ◽  
Fluid Manipulation ◽  
Male Subjects

To investigate the effects of varying levels of hypohydration on ratings of perceived exertion (RPE) during moderate and heavy submaximal exercise, and at the lactate threshold (LT) and ventilatory threshold (VT), 9 male subjects cycled under states of euhydration (EU), moderate hypohydration (MH), and severe hypohydration (SH). The desired level of hypohydration was achieved over a 36-hr period by having subjects cycle at 50% VO2max in a 38°C environment on two occasions while controlling fluid intake and diet. During submaximal exercise, oxygen uptake, ventilation, heart rate, blood lactate, and RPE were not significantly different among treatments. Hypohydration did not significantly alter LT or VT, or perceptual responses at LT or VT. It is concluded that hypohydration of up to 5.6% caused by fluid manipulation and exercise in the heat over a 36-hr period does not alter RPE or the lactate or ventilatory threshold, nor RPE at the lactate and ventilatory thresholds measured during moderate and heavy submaximal cycling in a neutral (22°C) environment.

Sign in / Sign up

Export Citation Format

Share Document