scholarly journals Acute Responses to Forearm Compression of Blood Lactate Accumulation, Heart Rate, Perceived Exertion, and Muscle Pain in Elite Climbers

2018 ◽  
Vol 9 ◽  
Author(s):  
Florian Azad Engel ◽  
Billy Sperlich ◽  
Urs Stöcker ◽  
Peter Wolf ◽  
Volker Schöffl ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Muscle Pain ◽  
Perceived Exertion ◽  
Lactate Accumulation ◽  
Acute Responses ◽  
Blood Lactate Accumulation

scholarly journals Borg’s category ratio-scale (CR-10) is useful to predict the onset of blood lactate accumulation (OBLA) in young Mexicans adults, regardless their body mass

2019 ◽  
Vol 26 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Arnulfo Ramos Jiménez ◽  
Abraham Wall Medrano ◽  
Marco Antonio Hernández Lepe ◽  
Gregorio Chávez Treviño ◽  
Jaime Guereca Arvizuo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Blood Lactate ◽  
Body Mass ◽  
Maximal Exercise ◽  
Regression Equations ◽  
Ratio Scale ◽  
Exercise Tests ◽  
Lactate Accumulation ◽  
Blood Lactate Accumulation

Aim: To evaluate the predictive value of Borg’s category ratio-scale (CR-10; 1-10) toward the onset of blood lactate accumulation (OBLA). Methods: 91 young Mexicans performed three non-consecutive sub-maximal exercise tests. Heart rate (HR), blood lactate and oxygen uptake were recorded at each CR-10 rating. Regression equations, reliable HR and CR-10 cut-off points of OBLA were then calculated. Results: HR (86 beats/min) and CR-10 (4.5) predicted OBLA with the same certainty, regardless the subject’s body mass. CR-10, HR and oxygen uptake, independently explained more than 60% of the associated variance to OBLA. Conclusions: CR-10 is useful to predict OBLA with almost the same certainty that HR, regardless the subject’s body mass.

Onset of blood lactate accumulation and peak oxygen uptake during graded walking test combined with and without restricted leg blood flow

2012 ◽  
Vol 8 (2) ◽  
pp. 117-122 ◽  
Author(s):  
M. Sakamaki-Sunaga ◽  
J.P. Loenneke ◽  
R.S. Thiebaud ◽  
T. Abe
Keyword(s):  
Heart Rate ◽  
Blood Flow ◽  
Oxygen Uptake ◽  
Stroke Volume ◽  
Blood Lactate ◽  
Peak Oxygen Uptake ◽  
Free Flow ◽  
Walking Test ◽  
Lactate Accumulation ◽  
Blood Lactate Accumulation

The purpose of this study was to compare the peak oxygen uptake (VO2peak) and lactate threshold / onset of blood lactate accumulation (LT/OBLA) during an incremental exercise test with and without blood flow restriction (BFR). Six male subjects performed a graded walking test on a treadmill with and without BFR in random order, and oxygen uptake (VO2), minute ventilation (VE), and blood lactate concentration were measured during each test. During the BFR test, the subjects wore pressure cuff belts on the most proximal portion of each thigh. At a given workload (e.g. during walking at 100 m/min) VO2 was 17% higher in BFR than in free-flow. Exercise time to exhaustion during BFR was shorter compared with free-flow despite the ratings of perceived exertion being similar between both conditions. Peak heart rate did not reach same level in the BFR test as it did in free-flow, with the heart rate 5 beats lower with BFR. VO2peak and VE peak were also 17% and 9%, respectively, lower in BFR than in free-flow. Compared with the control, O2 pulse (an index of stroke volume) was 14% lower in BFR. During BFR, VO2 at LT and OBLA were lower compared with free-flow. However, percentages of VO2peak at LT and OBLA were similar between BFR and free-flow. Our results suggest that the BFR-induced decrease in VO2peak may be associated with reductions in venous return and stroke volume. Additionally, these results suggest that increased muscle fiber recruitment with BFR may relate to the earlier LT/OBLA observed at lower intensities.

scholarly journals Exercise intensity during official soccer matches

2016 ◽  
Vol 18 (6) ◽  
pp. 621 ◽  
Author(s):  
Daniel Barbosa Coelho ◽  
Rodney Coelho da Paixão ◽  
Emerson Cruz de Oliveira ◽  
Lenice Kappes Becker ◽  
João Batista Ferreira-Júnior ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Field Test ◽  
Exercise Intensity ◽  
Intermediate Phase ◽  
Age Groups ◽  
Soccer Players ◽  
Blood Lactate Accumulation ◽  
Intensity Of Exercise ◽  
In The Beginning

DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n6p621 The aims of the study were: 1) to analyze the exercise intensity in several phases (six phases of 15 min) of soccer matches; 2) to compare the match time spent above anaerobic threshold (AT) between different age groups (U-17 and U-20); and 3) to compare the match time spent above AT between players’ positions (backs, midfielders, forwards and wingabcks). Forty-four male soccer players were analyzed. To express players’ effort, the heart rate (HR) was continuously monitored in 29 official matches. Further, HR corresponding to the intensity at the onset of blood lactate accumulation (OBLA) was obtained in a field test. The highest exercise intensity during match was observed in the 15-30 min period of the first half (p< 0.05). Match time spent above AT was not different between players from U-17 and U-20. In the comparison among players’ positions, wingbacks showed lower time above AT (p< 0.05) than players of other positions. The intensity of effort is higher in the 15 to 30 minutes of play (intermediate phase), probably because the players are more rested in the beginning and wearing out is progressive throughout the game. It is also noteworthy that the intensity of exercise (HR and time above AT) of wingbacks was lower, probably because they usually are required to run a larger number of sprints and need more time below the AT to recover. 

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