scholarly journals Cardiorespiratory Profile and Performance Demands of Elite Hip-Hop Dancers: Breaking and New Style

2018 ◽  
Vol 33 (3) ◽  
pp. 198-204 ◽  
Author(s):  
Matthew A Wyon ◽  
Julie Harris ◽  
Faye Adams ◽  
Ross Cloak ◽  
Francis A Clarke ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Hip Hop ◽  
Gas Analysis ◽  
Performance Data ◽  
Treadmill Test ◽  
Dance Performance ◽  
Physiological Demands ◽  
And Performance ◽  
Performance Demands

AIMS: Dancers need to constantly maintain and develop their physiological capabilities to support their performances. Previously these physiological demands have been investigated only in traditional dance styles such as ballet and modern. The aim of this study was to examine the physiological demands of two types of hip-hop: new style and break dance. METHODS: Nine female new style dancers (age 20±6 yrs, height 163.5±1.4 cm, mass 55.8±22 kg) and 9 male break dancers (age 23±4.2 yrs, height 178.2±5.7 cm, mass 62.1±7.7 kg) volunteered for the study. Each subject completed a maximal graded treadmill test and a dance performance routine, either new style (approx 1:45–2:30 min) or breaking (2 min). Breathe-by-breathe gas analysis and heart rate (HR) were collected by a portable gas analyser, and blood lactate (BLa) was measured at the end of the treadmill test and each routine. RESULTS: The male breaker dancers had significantly higher VO2 peak than other equivalent dancers in other genres, whilst the female new style dancers were similar to that previously reported for female dancers. Performance data showed significant differences between the two styles for VO2, HR, and BLa (p<0.001) and for VO2 and HR relative to individual maximal treadmill data (p<0.05). CONCLUSION: New style is more comparable to other theatrical dance genres, with a lower relative mean VO2 demand, whilst break dance is shorter in duration, allowing a higher cardiorespiratory demand and generating significant levels of blood lactate. This difference is also reflected in the dancers’ cardiorespiratory profiles.

scholarly journals Wearable Technologies in Field Hockey Competitions: A Scoping Review

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5242
Author(s):  
Jolene Ziyuan Lim ◽  
Alexiaa Sim ◽  
Pui Wah Kong
Keyword(s):  
Heart Rate ◽  
Inertial Sensors ◽  
Wearable Devices ◽  
Field Hockey ◽  
Heart Rate Monitors ◽  
Search Terms ◽  
Physiological Demands ◽  
And Performance ◽  
Future Work ◽  
Skin Temperatures

The aim of this review is to investigate the common wearable devices currently used in field hockey competitions, and to understand the hockey-specific parameters these devices measure. A systematic search was conducted by using three electronic databases and search terms that included field hockey, wearables, accelerometers, inertial sensors, global positioning system (GPS), heart rate monitors, load, performance analysis, player activity profiles, and competitions from the earliest record. The review included 39 studies that used wearable devices during competitions. GPS units were found to be the most common wearable in elite field hockey competitions, followed by heart rate monitors. Wearables in field hockey are mostly used to measure player activity profiles and physiological demands. Inconsistencies in sampling rates and performance bands make comparisons between studies challenging. Nonetheless, this review demonstrated that wearable devices are being used for various applications in field hockey. Researchers, engineers, coaches, and sport scientists can consider using GPS units of higher sampling rates, as well as including additional variables such as skin temperatures and injury associations, to provide a more thorough evaluation of players’ physical and physiological performances. Future work should include goalkeepers and non-elite players who are less studied in the current literature.

Heart Rate and Performance in Manual Missile Guidance

1971 ◽  
Vol 32 (2) ◽  
pp. 352-354
Author(s):  
Bengt Bergstroem ◽  
Peter Arnberg
Keyword(s):  
Heart Rate ◽  
Performance Data ◽  
Tracking Performance ◽  
Missile Guidance ◽  
Heart Rates ◽  
Laboratory Conditions ◽  
Stress Studies ◽  
And Performance

Earlier stress studies under laboratory conditions show that heart rates from 100 to 110 bpm are associated with significant decrements in missile-tracking performance. Data from real missile tracking by 8 operators with no stress deliberately induced indicate, however, that performance is unaffected up to 135 bpm, and only moderately affected in the 135- to 170-bpm region. The disagreement between the two sets of results highlights the difficulties in generalizing from stress experiments.

scholarly journals Dose Response of a Novel Exogenous Ketone Supplement on Physiological, Perceptual, and Performance Parameters

2020 ◽  
Author(s):  
Philip Prins ◽  
Dominic P. D’Agostino ◽  
Christopher Q. Rogers ◽  
Dana L. Ault ◽  
Gary L. Welton ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cognitive Performance ◽  
Blood Lactate ◽  
Exercise Performance ◽  
Ketone Bodies ◽  
Time Trial ◽  
Gaseous Exchange ◽  
Double Blind ◽  
Post Exercise ◽  
And Performance

Abstract Background: Interest into the health, disease, and performance impact of exogenous ketone bodies has rapidly expanded due to their multifaceted physiological and signaling properties but limiting our understanding is the isolated analyses of individual types and dose/dosing protocols. Methods: Thirteen recreational male distance runners (24.8±9.6y, 72.5±8.3kg, VO2max 60.1±5.4ml/kg/min) participated in this randomized, double-blind, crossover design study. The first two sessions consisted of a 5-km running time trial (TT) familiarization and a VO2max test. During subsequent trials, subjects were randomly assigned to one (KS1:22.1g) or two (KS2:44.2g) doses of beta-hydroxybutyrate (βHB) and medium chain triglycerides (MCTs) or flavor matched placebo (PLA). Blood R-βHB, glucose, and lactate concentrations were measured at baseline (0-min), post-supplement (30 & 60mins), post-exercise (+0min, +15mins). Time, HR, RPE, affect, RER, VO2, VCO2, and VE were measured during exercise. Cognitive performance was evaluated prior to and post-exercise. Results: KS significantly increased R-βHB, with more potent and prolonged elevations in KS2, illustrating an administrative and dosing effect. R-βHB was significantly decreased in KS1 compared to KS2 illustrating a dosing and exercise interaction effect. Blood glucose elevated post-exercise but was unchanged across groups. Blood lactate significantly increased post-exercise but was augmented by KS administration. Gaseous exchange, respiration, heart rate, affect, RPE, and exercise performance was unaltered with KS administration. However, clear responders and none-responders were indicated. KS2 significantly augmented cognitive function in pre-exercise conditions, while exercise increased cognitive performance for KS1 and PLA to pre-exercise KS2 levels. Conclusion: Novel βHB+MCT formulation had a dosing effect on R-βHB and cognitive performance, an administrative response on blood lactate, while not influencing gaseous exchange, respiration, heart rate, affect, RPE, and exercise performance.

The Physiological Effects of Swimming Competition on 16–17-Year-Old Elite Female Swimmers

1999 ◽  
Vol 11 (1) ◽  
pp. 22-31 ◽  
Author(s):  
Amanda J. Griffin ◽  
Viswanath B. Unnithan ◽  
Peter Ridges
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Anaerobic Power ◽  
Wingate Test ◽  
Physiological Parameters ◽  
Physiological Effects ◽  
Testing Session ◽  
Treadmill Test ◽  
On Line

The purpose of this study was to assess the effects of a weekend of swimming competition on various physiological parameters in a group of elite female swimmers. Eight female swimmers (age, 16.6 ± 0.5 years) participated in this study. Resting blood lactate (Bla) and heart rate (HR) were taken at the beginning of each testing session. Testing involved a discontinuous incremental peak VO2 treadmill test during which on-line, measures of VO2 were obtained. HR and Bla measurements were taken at the end of each exercise increment. A 30-s leg Wingate test (WAnT) was used to measure anaerobic power. Paired t-tests were carried out on all data. Resting HR was significantly higher and submaximal and maximal HR were significantly lower comparing pre- and postcompetition (p < .005). Resting Bla and submaximal VO2 were significantly higher postcompetition (p < .005). The results suggest that swimming competition causes a number of the recognized symptoms related to excitatory (acute) overtraining

scholarly journals Heart rate and blood lactate responses during the cross-country test of 2-star to 5-star eventing competitions

2020 ◽  
Vol 16 (4) ◽  
pp. 303-318
Author(s):  
K. Kirsch ◽  
S. Horstmann ◽  
H. Holzhausen ◽  
D. Serteyn ◽  
C. Sandersen
Keyword(s):  
Blood Lactate ◽  
Height Profile ◽  
Mean Velocity ◽  
Post Exercise ◽  
Linear Mixed Effects ◽  
Competition Level ◽  
Physiological Demands ◽  
Cross Country ◽  
And Performance ◽  
Different Levels

The objective of this retrospective study was to evaluate the physiological demands of cross-country competitions at different levels. Heart rates (HR) and post exercise blood lactate concentrations (LAC) measured between 2010 and 2019 in response to 1,463 cross-country competitions (437 at 2-star, 703 at 3-star, 313 at 4-star and 10 at 5-star level) in 294 horses were analysed. The effect of competition level, mean velocity, height profile, total distance, number of jumping efforts, climate, age, sex, percentage of Thoroughbred blood and performance level on HR, LAC, HR recovery and LAC disappearance rates was evaluated by Linear Mixed Effects Models. Mean HR and LAC significantly increased from 2-star to 4-star level (P<0.001). Each 30 m/min increase in mean velocity was associated with a 3 beats/min increase in HR (P<0.001) and a 41% increase in LAC (P<0.001) and each 30 m increase in cumulative elevation with a 2 beats/min increase in HR (P<0.001) and a 32% increase in LAC (P<0.001). Each 20 m increase in mean distance per jumping effort was associated with a 1 beat/min decrease in HR (P<0.01) and a 13% decrease in LAC (P<0.001). Compared to Warmbloods, horses with 75% Thoroughbred blood had 4 beats/min lower HRs (P<0.05) and 34% lower LAC values (P<0.001). Each 5 years increase in age was associated with a 4 beats/min decrease in HR (P<0.001, only in mares) and an 11% decrease in LAC (P<0.01). The HRs during the first 3 minutes of recovery were higher at warmer and more humid conditions (P<0.05). The rate of LAC disappearance was higher in horses with higher percentages of Thoroughbred blood (P<0.05).

scholarly journals Acute physiological responses and performance following subsequent CrossFit ‘CINDY’ workout with Zea Mays juice

2018 ◽  
Vol 23 (2) ◽  
pp. 57-63 ◽  
Author(s):  
A. Ahmad ◽  
N. Jusoh ◽  
R.Y. Tengah
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Physiological Responses ◽  
Exercise Session ◽  
Exercise Heart Rate ◽  
Double Blind ◽  
Physically Active ◽  
Significant Difference ◽  
Rest Time ◽  
And Performance

Purpose: The purpose of this study was to investigate the physiological responses and performance following subsequent repeated high intensity exercise with consumption of Zea may juice ( ZM ) Materials: Total of seventeen participants involved in the study. They were physically active who had cardio and strength training at least 3 times per week. The age of participants was 21.8±1.7 years old, body weight 65.4±11.2 kg and height 169.7±7.2 cm. Crossfit ‘CINDY’ exercise were repeated between two hours of rest. Treatment beverage of ( ZM ) juice vs Carbohydrate-electrolyte (CE) drinks were consumed immediately after exercise in double blind cross over manner. Number of complete set of exercise, heart rate, blood lactate and rate of perceived exhaustion (RPE) were recorded at the end of each exercise session. Results: Total number of complete ‘CINDY’ exercise significantly increased in ZM juice group during second bout of exercise compared to CE drink group. There were no significant difference in heart rate, blood lactate and RPE in both groups Conclusions: ZM juice has potentials an alternative recovery beverage to promote subsequent repeated exercise within short rest time.

scholarly journals Dose Response of a Novel Exogenous Ketone Supplement on Physiological, Perceptual, and Performance Parameters

2020 ◽  
Author(s):  
Philip Prins ◽  
Dominic P. D’Agostino ◽  
Christopher Q. Rogers ◽  
Dana L. Ault ◽  
Gary L. Welton ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cognitive Performance ◽  
Blood Lactate ◽  
Exercise Performance ◽  
Ketone Bodies ◽  
Time Trial ◽  
Gaseous Exchange ◽  
Double Blind ◽  
Post Exercise ◽  
And Performance

Abstract Background: Interest into the health, disease, and performance impact of exogenous ketone bodies has rapidly expanded due to their multifaceted physiological and signaling properties but limiting our understanding is the isolated analyses of individual types and dose/dosing protocols. Methods: Thirteen recreational male distance runners (24.8±9.6y, 72.5±8.3kg, VO2max 60.1±5.4ml/kg/min) participated in this randomized, double-blind, crossover design study. The first two sessions consisted of a 5-km running time trial (TT) familiarization and a VO2max test. During subsequent trials, subjects were randomly assigned to one (KS1:22.1g) or two (KS2:44.2g) doses of beta-hydroxybutyrate (βHB) and medium chain triglycerides (MCTs) or flavor matched placebo (PLA). Blood R-βHB, glucose, and lactate concentrations were measured at baseline (0-min), post-supplement (30 & 60mins), post-exercise (+0min, +15mins). Time, HR, RPE, affect, RER, VO2, VCO2, and VE were measured during exercise. Cognitive performance was evaluated prior to and post-exercise. Results: KS significantly increased R-βHB, with more potent and prolonged elevations in KS2, illustrating an administrative and dosing effect. R-βHB was significantly decreased in KS1 compared to KS2 illustrating a dosing and exercise interaction effect. Blood glucose elevated post-exercise but was unchanged across groups. Blood lactate significantly increased post-exercise but was augmented by KS administration. Gaseous exchange, respiration, heart rate, affect, RPE, and exercise performance was unaltered with KS administration. However, clear responders and none-responders were indicated. KS2 significantly augmented cognitive function in pre-exercise conditions, while exercise increased cognitive performance for KS1 and PLA to pre-exercise KS2 levels. Conclusion: Novel βHB+MCT formulation had a dosing effect on R-βHB and cognitive performance, an administrative response on blood lactate, while not influencing gaseous exchange, respiration, heart rate, affect, RPE, and exercise performance.

scholarly journals Análisis antropométrico, fisiológico y temporal en jugadoras de pádel de elite (Anthropometric, physiological and temporal analysis in elite female paddle players)

Retos ◽  
2015 ◽  
pp. 107-112
Author(s):  
Francisco Pradas de la Fuente ◽  
Javier Cachón Zagalaz ◽  
David Otín Benedí ◽  
Alejandro Quintas Hijós ◽  
Salas Inmaculada Arraco Castellar ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Temporal Structure ◽  
Recovery Period ◽  
Temporal Analysis ◽  
Playing Time ◽  
And Performance ◽  
Lactate Levels ◽  
Simulated Match ◽  
Blood Lactate Levels

El objetivo de este estudio fue determinar en el pádel femenino de elite (PFE) las características antropométricas, la respuesta fisiológica y la estructura temporal producida durante una competición simulada (CS). Seis jugadoras con una experiencia mínima de 4 años en pruebas del circuito oficial fueron seleccionadas para participar en esta investigación. Se registraron diferentes medidas corporales para estudiar el perfil antropométrico: masa corporal, talla, 6 pliegues, 4 perímetros y 3 diámetros. Durante la CS fueron registradas las siguientes variables: i. Frecuencia cardíaca máxima (FCmáx), mínima (FCmín) y media (FCmed) de cada juego, set y total; ii. Niveles lácticos al terminar cada set, al finalizar el partido y en los minutos 2, 4, 6, 8 y 10 del periodo de recuperación; iii. Tiempo de juego total. Los valores antropométricos analizados reflejaron un somatotipo endo-mesomórfico (3.7-4.2-2.5). Los resultados fisiológicos obtenidos durante la CS fueron de 177±9.2 y 151±8.1 lpm para la FCmáx y FCmed respectivamente. Los niveles lácticos máximos alcanzados fueron de 2.4±.6 mmol.l. La duración media de los partidos fue de 56:11±00:38 m. La FCmáx fue de un 76.3% respecto a la máxima hallada en laboratorio. Los niveles de lactacidemia registrados situaron el esfuerzo en la vía metabólica aeróbica con cortos periodos entre el metabolismo aeróbico-anaeróbico. Conocer estos datos resulta de gran utilidad como método de control del rendimiento y de planificación del entrenamiento en el PFE.Palabras clave: composición corporal, somatotipo, lactato, frecuencia cardiaca, estructura temporal.Abstract: The aim of this study was to analyze anthropometric characteristics, physiological response and structure temporal produced in elite female paddle players (EFPP) during a simulated competition (SC). Six EFPP, with four years minimum experience in official circuit competitions, were selected for this study. Different body measures were registered to obtain the anthropometric profile: body mass, height, 6 skinfolds, 4 girths and 3 breadths. During CS the following variables were recorded: i. Maximum heart rate (HRmax), minimum and medium heart reat (HRmin and HRmed) on each game, set and final match; ii. Blood lactate levels after each set and lactate levels in minutes 2, 4, 6, 8, and 10 during recovery period; iii. Total playing time. Anthropometric values showed a mesoendomorfic somatotype (3.7-4.2-2.5). Physiological results showed that average achieved during SC was 177±9.2 and 151±8.1 bmp HRmax and HRmed, respectively. Maximum blood lactate levels showed by EFPP were 2.4±0.6 mMol.L-1. The mean match time was 56:11±00:38 m. Percentage of HRmax during simulated match was 76.3% of maximum value obtained during laboratory test. Blood lactate levels during SC showed that EFPP spent most of the time at aerobic intensities with brief periods at anaerobic intensities. Data obtained in this study provides useful information in EFPP training periodization and performance management.Key words: body composition, somatotype, blood lactate, heart rate, temporal structure.

scholarly journals Physiological, Perceptual and Performance Responses Associated With Self-Selected Versus Standardized Recovery Periods During a Repeated Sprint Protocol in Elite Youth Football Players: A Preliminary Study

2017 ◽  
Vol 29 (2) ◽  
pp. 186-193 ◽  
Author(s):  
Neil Gibson ◽  
Callum Brownstein ◽  
Derek Ball ◽  
Craig Twist
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Perceived Exertion ◽  
Muscle Power ◽  
Heart Rate Recovery ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Lower Body ◽  
Repeated Sprint ◽  
And Performance

Purpose:To examine the physiological and perceptual responses of youth footballers to a repeated sprint protocol employing standardized and self-selected recovery.Methods:Eleven male participants (13.7 ± 1.1 years) performed a repeated sprint assessment comprising 10 × 30 m efforts. Employing a randomized cross-over design, repeated sprints were performed using 30 s and self-selected recovery periods. Heart rate was monitored continuously with ratings of perceived exertion (RPE) and lower body muscle power measured 2 min after the final sprint. The concentration of blood lactate was measured at 2, 5 and 7 min post sprinting. Magnitude of effects were reported using effect size (ES) statistics ± 90% confidence interval and percentage differences. Differences between trials were examined using paired student t tests (p < .05).Results:Self-selected recovery resulted in most likely shorter recovery times (57.7%; ES 1.55 ± 0.5; p < .01), a most likely increase in percentage decrement (65%; ES 0.36 ± 0.21; p = .12), very likely lower heart rate recovery (-58.9%; ES -1.10 ± 0.72; p = .05), and likely higher blood lactate concentration (p = .08–0.02). Differences in lower body power and RPE were unclear (p > .05).Conclusion:Self-selected recovery periods compromise repeated sprint performance.

scholarly journals Dose Response of a Novel Exogenous Ketone Supplement on Physiological, Perceptual, and Performance Parameters

2020 ◽  
Author(s):  
Philip Prins ◽  
Dominic P. D’Agostino ◽  
Christopher Q. Rogers ◽  
Dana L. Ault ◽  
Gary L. Welton ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cognitive Performance ◽  
Blood Lactate ◽  
Exercise Performance ◽  
Ketone Bodies ◽  
Time Trial ◽  
Gaseous Exchange ◽  
Double Blind ◽  
Post Exercise ◽  
And Performance

Abstract Background: Interest into the health, disease, and performance impact of exogenous ketone bodies has rapidly expanded due to their multifaceted physiological and signaling properties but limiting our understanding is the isolated analyses of individual types and dose/dosing protocols.Methods: Thirteen recreational male distance runners (24.8±9.6y, 72.5±8.3kg, VO2max 60.1±5.4ml/kg/min) participated in this randomized, double-blind, crossover design study. The first two sessions consisted of a 5-km running time trial (TT) familiarization and a VO2max test. During subsequent trials, subjects were randomly assigned to one (KS1:22.1g) or two (KS2:44.2g) doses of beta-hydroxybutyrate (βHB) and medium chain triglycerides (MCTs) or flavor matched placebo (PLA). Blood R-βHB, glucose, and lactate concentrations were measured at baseline (0-min), post-supplement (30 & 60mins), post-exercise (+0min, +15mins). Time, HR, RPE, affect, RER, VO2, VCO2, and VE were measured during exercise. Cognitive performance was evaluated prior to and post-exercise.Results: KS significantly increased R-βHB, with more potent and prolonged elevations in KS2, illustrating an administrative and dosing effect. R-βHB was significantly decreased in KS1 compared to KS2 illustrating a dosing and exercise interaction effect. Blood glucose elevated post-exercise but was unchanged across groups. Blood lactate significantly increased post-exercise but was augmented by KS administration. Gaseous exchange, respiration, heart rate, affect, RPE, and exercise performance was unaltered with KS administration. However, clear responders and none-responders were indicated. KS2 significantly augmented cognitive function in pre-exercise conditions, while exercise increased cognitive performance for KS1 and PLA to pre-exercise KS2 levels. Conclusion: Novel βHB+MCT formulation had a dosing effect on R-βHB and cognitive performance, an administrative response on blood lactate, while not influencing gaseous exchange, respiration, heart rate, affect, RPE, and exercise performance.

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