Performance, rating of perceived exertion and physiological responses during a Brazilian jiu-jitsu match: comparisons between winning and losing athletes

2019 ◽  
Vol 15 (1) ◽  
pp. 229-235
Author(s):  
Emerson Franchini ◽  
João Paulo Lopes da Silva
Keyword(s):  
Perceived Exertion ◽  
Physiological Responses ◽  
Rating Of Perceived Exertion ◽  
Performance Rating

Physiological Responses and Perceived Exertion During International Taekwondo Competition

2009 ◽  
Vol 4 (4) ◽  
pp. 485-493 ◽  
Author(s):  
Craig A. Bridge ◽  
Michelle A. Jones ◽  
Barry Drust
Keyword(s):  
Blood Lactate ◽  
Perceived Exertion ◽  
Anaerobic Metabolism ◽  
Physiological Responses ◽  
Cardiovascular Responses ◽  
Capillary Blood ◽  
Rating Of Perceived Exertion ◽  
International Level ◽  
Combat Training ◽  
Aerobic And Anaerobic

Purpose:To investigate the physiological responses and perceived exertion during international Taekwondo competition.Methods:Eight male Taekwondo black belts (mean ± SD, age 22 ± 4 y, body mass 69.4 ± 13.4 kg, height 1.82 ± 0.10 m, competition experience 9 ± 5 y) took part in an international-level Taekwondo competition. Each combat included three 2-min rounds with 30 s of recovery between each round. Heart rate (HR) was recorded at 5-s intervals during each combat. Capillary blood lactate samples were taken from the fingertip 1 min before competition, directly after each round and 1 min after competition. Competitors’ rating of perceived exertion (RPE) was recorded for each round using Borg’s 6-to-20 scale.Results:HR (round 1: 175 ± 15 to round 3: 187 ± 8 beats·min−1; P < .05), percentage of HR maximum (round 1: 89 ± 8 to round 3: 96 ± 5% HRmax; P < .05), blood lactate (round 1: 7.5 ± 1.6 to round 3: 11.9 ± 2.1 mmol·L-1; P < .05) and RPE (round 1: 11 ± 2 to round 3: 14 ± 2; P < .05; mean ± SD) increased significantly across rounds.Conclusions:International-level Taekwondo competition elicited near-maximal cardiovascular responses, high blood lactate concentrations, and increases in competitors' RPE across combat. Training should therefore include exercise bouts that sufficiently stimulate both aerobic and anaerobic metabolism.

The Effects of Caffeine in Women during Aerobic-Dance Bench Stepping

2007 ◽  
Vol 17 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Jennifer N. Ahrens ◽  
Lisa K. Lloyd ◽  
Sylvia H. Crixell ◽  
John L. Walker
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Minute Ventilation ◽  
Physiological Responses ◽  
Rating Of Perceived Exertion ◽  
Caffeine Ingestion ◽  
Fitness Level ◽  
Aerobic Dance ◽  
Control Body ◽  
And Control

People of all ages and fitness levels participate regularly in aerobic-dance bench stepping (ADBS) to increase fitness and control body weight. Any reasonable method for enhancing the experience or effectiveness of ADBS would be beneficial. This study examined the acute effects of a single dose of caffeine on physiological responses during ADBS in women. When compared with a placebo, neither a 3- nor a 6-mg/kg dose of caffeine altered physiological responses or rating of perceived exertion (RPE) in 20 women (age 19–28 y) of average fitness level, not habituated to caffeine, while they performed an ADBS routine. Since neither dose of caffeine had any effect on VO2, Vco2, minute ventilation, respiratory-exchange ratio, rate of energy expenditure, heart rate, or RPE during ADBS exercise, it would not be prudent for a group exercise leader to recommend caffeine to increase energy cost or decrease perception of effort in an ADBS session. Furthermore, caffeine ingestion should not interfere with monitoring intensity using heart rate or RPE during ADBS.

scholarly journals Effect of Ambient Oxygen Content, Safety Shoe Type, and Lifting Frequency on Subject’s MAWL and Physiological Responses

2019 ◽  
Vol 16 (21) ◽  
pp. 4172 ◽  
Author(s):  
Atef M. Ghaleb ◽  
Mohamed Z. Ramadan ◽  
Ahmed Badwelan ◽  
Khalid Saad Aljaloud
Keyword(s):  
Heart Rate ◽  
Oxygen Content ◽  
Perceived Exertion ◽  
Physiological Responses ◽  
Erector Spinae ◽  
Rating Of Perceived Exertion ◽  
Independent Variables ◽  
Repeated Measures Design ◽  
Ambient Oxygen ◽  
Dependent Variables

Objective: The purpose of this study was to evaluate the lifting capabilities of individuals in hypoxia when they wear different types of safety shoes and to investigate the behavior of the physiological responses induced by the lifting process associated with those variables. Methods: An experimental design was used, based on two sessions. The first was training and acclimatization session, then an experimental lifting phase. A total of ten male students of King Saud University were recruited in the study. A four-way repeated measures design, with four independent variables and six dependent variables, was used in this research. The independent variables that were studied in the experimental lifting phase were: ambient oxygen content (15%, 18%, and 21%), safety shoes type (light-duty, medium-duty, and heavy-duty), lifting frequency (1 and 4 lifts/min), and replication (first and second trials). The dependent variables were also: maximum acceptable weights lifting using the psychophysical technique, heart rate (HR), electromyography (EMG) of (biceps brachii, trapezius, anterior deltoid, and erector spinae), safety shoes discomfort rating, rating of perceived exertion, and ambient oxygen discomfort rating. Results: The maximum acceptable weights lifting that were selected by participants at lower levels of the independent variables (ambient oxygen content 21%, lifting frequency 1 lift/min, and first replication) were significantly higher than at high levels of the independent variables (ambient oxygen content 15%, lifting frequency 4 lift/min, and second replication). Several interaction effects were also significant. Conclusions: It provides evidence that the ambient oxygen content increases the intensity of workload in lifting tasks. It showed that oxygen content affects the psychophysical selection of maximum acceptable weights lifting and the physiological responses represented in muscular activities and heart rate. It suggests that ambient oxygen content must be considered along with the type of safety shoes worn when the lifting task at altitudes occurs.

Physiological responses on the Concept II BikeErg and Concept II RowErg in well-trained male rowers

2020 ◽  
pp. 174795412096818
Author(s):  
Kirstie J Turner ◽  
Anthony J Rice
Keyword(s):  
Power Output ◽  
Perceived Exertion ◽  
Minute Ventilation ◽  
Physiological Responses ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Carbon Dioxide Production ◽  
Recovery Phase ◽  
Rating Of Perceived Exertion ◽  
Rate Of Oxygen Consumption

Stationary cycling is a common training mode of rowers, used to provide variety in training programs and prevent overuse injuries commonly associated with the repetitive nature of the rowing stroke. The purpose of this study was to investigate the differences in physiological responses on a Concept II BikeErg (Concept II BikeErg; Concept2 Inc., US) and Concept II RowErg (Concept II Model D; Concept2 Inc., US) at matched submaximal workloads so training load can be appropriately prescribed for stationary cycling. Ten well-trained, male rowers completed 6 min of exercise at four submaximal workloads (50%, 62.5%, 75% and 87.5% of their most recent 2000 m RowErg score) interspersed with 2-minute recovery periods on both ergometers in a single day. Ergometer order was randomised and balanced between groups. At matched power output (PO) results while on the RowErg were significantly higher across all workloads for rate of oxygen consumption ([Formula: see text]), rate of carbon dioxide production ([Formula: see text]), minute ventilation ([Formula: see text]) and heart rate (HR) (p < 0.05) and across the final two workloads for Rating of Perceived Exertion (RPE) and blood lactate concentration (BLa) (p < 0.05). When oxygen uptake at a fixed value ([Formula: see text] = 3.5 L.min−1) was matched between groups results while on the RowErg were significantly lower for PO, BLa, [Formula: see text], RER and RPE whereas [Formula: see text] and HR were similar to the BikeErg. These results support the understanding that displayed power output on the RowErg does not account for all work done during the rowing stroke cycle, specifically during the recovery phase. In conclusion, the physiological responses on the Concept II BikeErg are no more closely aligned to the Concept II RowErg than previously shown for similar cycle ergometers from different manufacturers. Due to the lack of consistency between Concept II BikeErg and Concept II RowErg PO, HR is better suited for the prescription of training loads on the BikeErg.

scholarly journals Maximal repetition performance, rating of perceived exertion, and muscle fatigue during paired set training performed with different rest intervals

2015 ◽  
Vol 13 (2) ◽  
pp. 104-110 ◽  
Author(s):  
Marianna de Freitas Maia ◽  
Gabriel Andrade Paz ◽  
Humberto Miranda ◽  
Vicente Lima ◽  
Claudio Melibeu Bentes ◽  
...  
Keyword(s):  
Muscle Fatigue ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Performance Rating ◽  
Rest Intervals

scholarly journals Upper- vs. Lower-Body Exercise Performance in Female and Male Cross-Country Skiers

2021 ◽  
Vol 3 ◽  
Author(s):  
Linda Marie Hansen ◽  
Øyvind Sandbakk ◽  
Gertjan Ettema ◽  
Julia Kathrin Baumgart
Keyword(s):  
Oxygen Uptake ◽  
Perceived Exertion ◽  
Physiological Responses ◽  
Peak Oxygen Uptake ◽  
Rating Of Perceived Exertion ◽  
Upper Body ◽  
Endurance Capacity ◽  
Lower Body ◽  
Exercise Modality ◽  
Cross Country

Purpose: To investigate the interaction between exercise modality (i.e., upper- and lower-body exercise) and sex in physiological responses and power output (PO) across the entire intensity spectrum (i.e., from low to maximal intensity).Methods: Ten male and 10 female cross-country (XC) skiers performed a stepwise incremental test to exhaustion consisting of 5 min stages with increasing workload employing upper-body poling (UP) and running (RUN) on two separate days. Mixed measures ANOVA were performed to investigate the interactions between exercise modalities (i.e., UP and RUN) and sex in physiological responses and PO across the entire exercise intensity spectrum.Results: The difference between UP and RUN (ΔUP−RUN), was not different in the female compared with the male XC skiers for peak oxygen uptake (18 ± 6 vs. 18 ± 6 mL·kg−1·min−1, p = 0.843) and peak PO (84 ± 18 vs. 91 ± 22 W, p = 0.207). At most given blood lactate and rating of perceived exertion values, ΔUP−RUN was larger in the male compared with the female skiers for oxygen uptake and PO, but these differences disappeared when the responses were expressed as % of the modality-specific peak.Conclusion: Modality-differences (i.e., ΔUP−RUN) in peak physiological responses and PO did not differ between the female and male XC skiers. This indicates that increased focus on upper-body strength and endurance training in female skiers in recent years may have closed the gap between upper- and lower-body endurance capacity compared with male XC skiers. In addition, no sex-related considerations need to be made when using relative physiological responses for intensity regulation within a specific exercise modality.

scholarly journals Effects of Carbohydrate, Caffeine, and Guarana on Cognitive Performance, Perceived Exertion, and Shooting Performance in High-Level Athletes

2019 ◽  
Vol 14 (5) ◽  
pp. 576-582 ◽  
Author(s):  
Laura Pomportes ◽  
Jeanick Brisswalter ◽  
Arnaud Hays ◽  
Karen Davranche
Keyword(s):  
Information Processing ◽  
Cognitive Performance ◽  
Perceived Exertion ◽  
Simon Task ◽  
Rating Of Perceived Exertion ◽  
Performance Rating ◽  
Speed Of Information Processing ◽  
Decision Making Processes ◽  
High Level ◽  
Mean Reaction Time

Purpose: To investigate the effect of ingesting carbohydrate (CHO), caffeine  (CAF), and a guarana complex (GUAc) during a running exercise on cognitive performance, rating of perceived exertion (RPE), and shooting performance in high-level modern pentathlon athletes. Methods: A total of 10 athletes completed 4 counterbalanced sessions within a 2-wk period, corresponding to ingestions of CHO (30 g), GUAc (300 mg), CAF (200 mg), or placebo. The exercise involved a 40-min run on a treadmill at a steady speed, previously determined as a “somewhat hard” exercise (RPE 13). Shooting and cognitive performance (Simon task) were assessed in 3 phases: before exercise and ingestion, before exercise and after half ingestion, and after exercise and full ingestion. Drinks were consumed 40 min (250 mL) and 5 min (125 mL) prior to exercise and after 20 min of running (125 mL). RPE was assessed at 10-min intervals during exercise. Results: There was an interaction between drink and exercise on mean reaction time (P = .01, ) and a drink effect on RPE (P = .01, ). CHO, CAF, and GUAc enhanced the speed of information processing after exercise (P = .003, P = .004, and P = .04, respectively), but only CAF and GUAc decreased RPE (P = .002 and P = .02, respectively). Conclusion: The results highlight a beneficial effect of nutritional supplements on information processing and RPE. This finding is particularly interesting as decision-making processes are crucial in the performance of many sports.

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