Effect of stage duration on maximal heart rate and post-exercise blood lactate concentration during incremental treadmill tests

2013 ◽  
Vol 16 (3) ◽  
pp. 276-280 ◽  
Author(s):  
Fabiana A. Machado ◽  
Ana Claudia P. Kravchychyn ◽  
Cecilia S. Peserico ◽  
Danilo F. da Silva ◽  
Paulo V. Mezzaroba
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Maximal Heart Rate ◽  
Stage Duration ◽  
Post Exercise

scholarly journals Influence of Intensity RAMP Incremental Test on Peak Power, Post-Exercise Blood Lactate, and Heart Rate Recovery in Males: Cross-Over Study

2019 ◽  
Vol 16 (20) ◽  
pp. 3934
Author(s):  
Kamil Michalik ◽  
Kuba Korta ◽  
Natalia Danek ◽  
Marcin Smolarek ◽  
Marek Zatoń
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Peak Power ◽  
Design Method ◽  
Heart Rate Recovery ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Peak Power Output ◽  
Maximal Heart Rate ◽  
Incremental Test

Background: The linearly increased loading (RAMP) incremental test is a method commonly used to evaluate physical performance in a laboratory, but the best-designed protocol remains unknown. The aim of this study was to compare the selected variables used in training control resulting from the two different intensities of RAMP incremental tests. Methods: Twenty healthy and physically active men took part in this experiment. The tests included two visits to a laboratory, during which anthropometric measurements, incremental test on a cycle ergometer, and examinations of heart rate and blood lactate concentration were made. The cross-over study design method was used. The subjects underwent a randomly selected RAMP test with incremental load: 0.278 W·s−1 or 0.556 W·s−1. They performed the second test a week later. Results: Peak power output was significantly higher by 51.69 W (p < 0.001; t = 13.10; ES = 1.13) in the 0.556 W·s−1 group. Total work done was significantly higher in the 0.278 W·s−1 group by 71.93 kJ (p < 0.001; t = 12.55; ES = 1.57). Maximal heart rate was significantly higher in the 0.278 W·s−1 group by 3.30 bpm (p < 0.01; t = 3.72; ES = 0.48). There were no statistically significant differences in heart rate recovery and peak blood lactate. Conclusions: We recommend use of the 0.556 W·s−1 RAMP protocol because it is of shorter duration compared with 0.278 W·s−1 and as such practically easier and of less effort for subjects.

Correlation of competition performance with heart rate and blood lactate response during interval training sessions in eventing horses

2019 ◽  
Vol 15 (3) ◽  
pp. 187-197 ◽  
Author(s):  
K. Kirsch ◽  
M. Düe ◽  
H. Holzhausen ◽  
C. Sandersen
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Performance Monitoring ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Interval Training ◽  
Exercise Tests ◽  
Post Exercise ◽  
Exponential Regression ◽  
The Difference

Objective performance monitoring in eventing horses is rare as the implementation of standardised exercise tests is commonly perceived to interfere with the daily training routine. The validity of performance parameters derived from GPS data, heart rate (HR) and post exercise blood lactate concentration (LAC) measured during usual training sessions should therefore be evaluated. Velocity (V), HR and post exercise LAC recorded during 172 interval training sessions in 30 horses were retrospectively analysed. Linear regression of HR, averaged over retrospectively defined speed ranges, was used to calculate the V at HRs of 150 (V150) and 200 (V200) beats/min. A single exponential regression model, fitted to LAC in relation to HR values from the whole group of horses, was used to predict LAC for each horse’s individual HR value and to calculate the difference between measured and predicted LAC (LACdiff). Recovery HRs were derived from bi-exponential regression of HR decrease after exercise. Results were compared between different stages of training in the same horses and between horses categorised as superior (SP) and average performer (AP) according to their competition performance. V150 and V200 significantly increased with progressing training. SP had higher V150 and V200 values, lower LACdiff values and lower HRs after 1 min of recovery (HRR60s) than AP. Competition performance was positively correlated to V150 and V200 but negatively correlated to LACdiff and HRR60s. Regular monitoring of HR and LAC in response to interval training provided valuable indicators of performance. The results of this study may contribute to an increased applicability of routine performance monitoring in eventing horses.

The physiology of bottlenose dolphins (Tursiops truncatus): heart rate, metabolic rate and plasma lactate concentration during exercise

1993 ◽  
Vol 179 (1) ◽  
pp. 31-46 ◽  
Author(s):  
T. M. Williams ◽  
W. A. Friedl ◽  
J. E. Haun
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Metabolic Rate ◽  
Respiratory Rate ◽  
Blood Lactate ◽  
Tursiops Truncatus ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Post Exercise ◽  
Terrestrial Mammals

Despite speculation about the swimming efficiency of cetaceans, few studies have investigated the exercise physiology of these mammals. In view of this, we examined the physiological responses and locomotor energetics of two exercising adult Tursiops truncatus. Oxygen consumption, heart rate, respiratory rate and post-exercise blood lactate concentration were determined for animals either pushing against a load cell or swimming next to a boat. Many of the energetic and cardiorespiratory responses of exercising dolphins were similar to those of terrestrial mammals. Average heart rate, respiratory rate and oxygen consumption for dolphins pushing against a load cell increased linearly with exercise levels up to 58 kg for a female dolphin and 85 kg for a male. Oxygen consumption did not increase with higher loads. Maximum rate of oxygen consumption (VO2max) ranged from 19.8 to 29.4 ml O2 kg-1 min-1, which was 7–11 times the calculated standard metabolic rate (VO2std) of the dolphins. Blood lactate concentration increased with exercise loads that exceeded VO2max. The maximum lactate concentration was 101.4 mg dl-1 (11.3 mmol l-1) for the male, and 120.6 mg dl-1 (13.6 mmol l-1) for the female. When swimming at 2.1 m s-1, heart rate, respiratory rate and post-exercise blood lactate concentration of the dolphins were not significantly different from values at rest. The cost of transport at this speed was 1.29 +/− 0.05 J kg-1 min-1. The energetic profile of the exercising bottlenose dolphin resembles that of a relatively sedentary mammal if the exercise variables defined for terrestrial mammals are used. However, the energetic cost of swimming for this cetacean is low in comparison to that of other aquatic and semi-aquatic mammals.

Predicting Cardiorespiratory Fitness in Female Soccer Players: The Basque Female Football Cohort Study

2021 ◽  
pp. 1-8
Author(s):  
Ibai Garcia-Tabar ◽  
Aitor Iturricastillo ◽  
Julen Castellano ◽  
Eduardo L. Cadore ◽  
Mikel Izquierdo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Cardiorespiratory Fitness ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Field Testing ◽  
Maximal Heart Rate ◽  
Gender Specific ◽  
Mass Field

Purpose: To develop gender-specific operational equations for prediction of cardiorespiratory fitness in female footballers. Method: Forty-eight semiprofessional female footballers performed an intermittent progressive maximal running test for determination of fixed blood lactate concentration (FBLC) thresholds. Relationships between FBLC thresholds and the physiological responses to submaximal running were examined. Developed equations (n = 48) were compared with equations previously obtained in another investigation performed in males (n = 100). Results: Submaximal velocity associated with 90% maximal heart rate was related to FBLC thresholds (r = .76 to .79; P < .001). Predictive power (R2 = .82 to .94) of a single blood lactate concentration (BLC) sample measured at 10 or 11.5 km·h−1 was very high. A single BLC sample taken after a 5-minute running bout at 8.5 km·h−1 was related to FBLC thresholds (r = −.71; P < .001). No difference (P = .15) in the regression lines predicting FBLC thresholds from velocity associated with 90% maximal heart rate was observed between the female and male cohorts. However, regressions estimating FBLC thresholds by a single BLC sample were different (P = .002). Conclusions: Velocity associated with 90% maximal heart rate was robustly related to FBLC thresholds and might serve for mass field testing independently of sex. BLC equations accurately predicted FBLC thresholds. However, these equations are gender-specific. This is the first study reporting operational equations to estimate the FBLC thresholds in female footballers. The use of these equations reduces the burden associated with cardiorespiratory testing. Further cross-validation studies are warranted to validate the proposed equations and establish them for mass field testing.

scholarly journals Effects of a 2-km Swim on Markers of Cycling Performance in Elite Age-Group Triathletes

Sports ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 82
Author(s):  
Jeffrey Rothschild ◽  
George H. Crocker
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Blood Lactate ◽  
Peak Power ◽  
Maximal Oxygen Consumption ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Cycling Performance ◽  
Age Group

The purpose of this study was to examine the effects of a 2-km swim on markers of subsequent cycling performance in well-trained, age-group triathletes. Fifteen participants (10 males, five females, 38.3 ± 8.4 years) performed two progressive cycling tests between two and ten days apart, one of which was immediately following a 2-km swim (33.7 ± 4.1 min). Cycling power at 4-mM blood lactate concentration decreased after swimming by an average of 3.8% (p = 0.03, 95% CI −7.7, 0.2%), while heart rate during submaximal cycling (220 W for males, 150 W for females) increased by an average of 4.0% (p = 0.02, 95% CI 1.7, 9.7%), compared to cycling without prior swimming. Maximal oxygen consumption decreased by an average of 4.0% (p = 0.01, 95% CI −6.5, −1.4%), and peak power decreased by an average of 4.5% (p < 0.01, 95% CI −7.3, −2.3%) after swimming, compared to cycling without prior swimming. Results from this study suggest that markers of submaximal and maximal cycling are impaired following a 2-km swim.

scholarly journals Fetal heart rate short term variation during labor in relation to scalp blood lactate concentration

2018 ◽  
Vol 97 (10) ◽  
pp. 1274-1280 ◽  
Author(s):  
Ke Lu ◽  
Malin Holzmann ◽  
Fahrad Abtahi ◽  
Kaj Lindecrantz ◽  
Pelle G Lindqvist ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Fetal Heart Rate ◽  
Fetal Heart ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Short Term ◽  
Term Variation
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