Caffeinated Energy Drinks Improve High-Speed Running in Elite Field Hockey Players

2016 ◽  
Vol 26 (1) ◽  
pp. 26-32 ◽  
Author(s):  
Juan Del Coso ◽  
Javier Portillo ◽  
Juan José Salinero ◽  
Beatriz Lara ◽  
Javier Abian-Vicen ◽  
...  
Keyword(s):  
Body Mass ◽  
High Intensity ◽  
High Speed ◽  
Energy Drinks ◽  
Energy Drink ◽  
Moderate Intensity ◽  
Field Hockey ◽  
Hockey Players ◽  
Gps Devices ◽  
Placebo Drink

The aim of this investigation was to determine the efficacy of a caffeine-containing energy drink to improve physical performance of elite field hockey players during a game. On 2 days separated by a week, 13 elite field hockey players (age and body mass = 23.2 ± 3.9 years and 76.1 ± 6.1 kg) ingested 3 mg of caffeine per kg of body mass in the form of an energy drink or the same drink without caffeine (placebo drink). After 60 min for caffeine absorption, participants played a simulated field hockey game (2 × 25 min). Individual running pace and instantaneous speed during the game were assessed using GPS devices. The total number of accelerations and decelerations was determined by accelerometry. Compared with the placebo drink, the caffeinated energy drink did not modify the total distance covered during the game (6,035 ± 451 m and 6,055 ± 499 m, respectively; p = .87), average heart rate (155 ± 13 beats per min and 158 ± 18 beats per min, respectively; p = .46), or the number of accelerations and decelerations (697 ± 285 and 618 ± 221, respectively; p = .15). However, the caffeinated energy drink reduced the distance covered at moderate-intensity running (793 ± 135 and 712 ± 116, respectively; p = .03) and increased the distance covered at high-intensity running (303 ± 67 m and 358 ± 117 m; p = .05) and sprinting (85 ± 41 m and 117 ± 55 m, respectively; p = .02). Elite field hockey players can benefit from ingesting caffeinated energy drinks because they increase the running distance covered at high-intensity running and sprinting. Increased running distance at high speed might represent a meaningful advantage for field hockey performance.

Relationships between physiological characteristics and match demands in elite-level male field hockey players

2021 ◽  
pp. 174795412199806
Author(s):  
Wayne P Lombard ◽  
Xudan Cai ◽  
Michael I Lambert ◽  
Xiaoping Chen ◽  
Lijuan Mao
Keyword(s):  
High Speed ◽  
Negative Relationship ◽  
Time Trial ◽  
Field Hockey ◽  
Physiological Variables ◽  
Body Strength ◽  
Hockey Players ◽  
Elite Level ◽  
Gps Devices ◽  
Repeat Sprint Ability

This study investigated the physical characteristics, match demands and their relationships in elite-level male field hockey players (n = 23; 24 ± 3 years). Testing data were collected to investigate the physiological profiles of the players, while match demands were quantified with GPS data over 26 matches. There were significant differences (p = <0.05) between positional groups for pull ups, relative and absolute lower body strength, and body composition. Average total match distance for all the players was (5420 ± 1518 m). There were significant differences between positional groups for defenders (5770 ± 1419 m) vs strikers (4739 ± 1409 m) and midfielders (5549 ± 1545 m) vs strikers. The most high-speed-running (>4.5 ms−1) distance was covered by midfielders (950 ± 275 m) and strikers (908 ± 284 m). Midfielders (116 ± 15 m min) and strikers (120 ± 20 m min) achieved higher intensities during matches compared to defenders (105 ± 13 m min). There were small differences between positional groups for physiological variables, but large variation between positional groups for match demands. There was a significant negative relationship between 2.4 km time trial vs high-speed running (p = <0.05), player load.min and match speed (p = <0.001). Also, there was a negative association between repeat sprint ability total time and high-speed running distance (p = <0.02) and match speed (p = <0.02). The countermovement jump height was associated with match speed (p = <0.05) and there was a negative relationship between body fat % and match speed (p = <0.02). When considering key performance indicators while using GPS devices, match speed (m.min) provides the most valuable information in field hockey players.

scholarly journals Effect of Changing Match Format from Halves to Quarters on the Performance Characteristics of Male University Field Hockey Players

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5490
Author(s):  
Elliot P. Lam ◽  
Caroline D. Sunderland ◽  
John G. Morris ◽  
Laura-Anne M. Furlong ◽  
Barry S. Mason ◽  
...  
Keyword(s):  
Heart Rate ◽  
High Speed ◽  
National Level ◽  
Performance Characteristics ◽  
Field Hockey ◽  
Heart Rate Monitors ◽  
Total Distance ◽  
Random Intercept ◽  
Hockey Players ◽  
The Uk

The study examined whether the performance characteristics of male university field hockey players differed when the match format was 2 × 35 min halves compared to 2 × 2 × 17.5 min quarters. Thirty-five male university field hockey players (age 21.2 ± 3.0 years, height 1.81 ± 0.07 m, body mass 75.1 ± 8.9 kg), competing at national level in the UK, were monitored over 52 matches played across the 2018–2019 (2 × 35 min halves) and 2019–2020 (2 × 2 × 17.5 min quarters) seasons using 15 Hz Global Positioning System units and heart rate monitors. Total distance, high-speed running distance (≥15.5 km·h−1), accelerations (≥2 m·s−1), decelerations (≤−2 m·s−1), average heart rate and percentage of time spent at >85% of maximum heart rate were recorded during both match formats. Two-level random intercept hierarchal models (Match—level 1, Player—level 2) suggested that the change in format from 2 × 35 min halves (2018–2019 season) to 2 × 2 × 17.5 min quarters (2019–2020 season) resulted in a reduction in total distance and high-speed running distance completed during a match (by 221 m and 120 m, respectively, both p < 0.001). As no significant cross-level interactions were observed (between season and half), the change from 35 min halves to 17.5 min quarters did not attenuate the reduced physical performance evident during the second half of matches (total distance: −235 m less in second half; high-speed running distance: −70 m less in second half; both p < 0.001). Overall, the findings suggest that the change in match format did alter the performance characteristics of male university field hockey players, but the quarter format actually reduced the total distance and high-speed running distance completed during matches, and did not attenuate the reduction in performance seen during the second half of matches.

scholarly journals A randomized, placebo-controlled crossover trial of a decaffeinated energy drink shows no significant acute effect on mental energy

2020 ◽  
Vol 111 (3) ◽  
pp. 719-727
Author(s):  
Alicia Garcia-Alvarez ◽  
Corbin A Cunningham ◽  
Byron Mui ◽  
Lia Penn ◽  
Erin M Spaulding ◽  
...  
Keyword(s):  
Reaction Time ◽  
Visual Information ◽  
Crossover Trial ◽  
Flanker Task ◽  
Energy Levels ◽  
Energy Drinks ◽  
Energy Drink ◽  
Cognitive Measures ◽  
Double Blind ◽  
Placebo Drink

ABSTRACT Background “Energy drinks” are heavily marketed to the general public, across the age spectrum. The efficacy of decaffeinated energy drinks in enhancing subjective feelings of energy (s-energy) is controversial. Objective The authors sought to test the efficacy of the caffeine-free version of a popular energy drink compared with a placebo drink. Methods This study was a randomized, double-blind, placebo-controlled, crossover trial in 223 healthy men and women aged 18–70 y with intention-to-treat and completers analysis. Participants were randomly assigned to consumption of either the decaffeinated energy drink or a placebo drink on testing day 1, and the other drink a week later. A battery of computer-based mood and cognitive tests to assess s-energy was conducted at baseline and at 0.5, 2.5, and 5 h post-ingestion. The main outcome measures were 1) mood, which was assessed by using a General Status Check Scale and the Profile of Mood States 2nd edition brief form, and 2) cognitive measures, including the N-back task (reaction time and accuracy), Reaction Time test, Flanker task (distraction avoidance), and Rapid Visual Information Processing test. Results No statistically significant or meaningful benefits were observed for any outcome measure, including mood and cognitive measures. Analyses of mean differences, slopes, and median differences were consistent. Conclusions No differences were detected across a range of mood/cognitive/behavioral/s-energy–level tests after consumption of the energy drink compared with a placebo drink in this diverse sample of adults. Thus, we found strong evidence that the energy drink is not efficacious in enhancing s-energy levels, nor any related cognitive or behavioral variables measured. In light of federal regulations, these findings suggest that labeling and marketing of some products which claim to provide these benefits may be unsubstantiated. This trial was registered at www.clinicaltrials.gov as NCT02727920.

scholarly journals Moderate-Intensity Exercise and High-Intensity Interval Training Affect Insulin Sensitivity Similarly in Obese Adults

2020 ◽  
Vol 105 (8) ◽  
pp. e2941-e2959 ◽  
Author(s):  
Benjamin J Ryan ◽  
Michael W Schleh ◽  
Cheehoon Ahn ◽  
Alison C Ludzki ◽  
Jenna B Gillen ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Insulin Sensitivity ◽  
Body Mass ◽  
High Intensity ◽  
Interval Training ◽  
Moderate Intensity ◽  
Exercise Session ◽  
High Intensity Interval Training ◽  
Metabolic Adaptations ◽  
High Intensity Interval

Abstract Objective We compared the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on insulin sensitivity and other important metabolic adaptations in adults with obesity. Methods Thirty-one inactive adults with obesity (age: 31 ± 6 years; body mass index: 33 ± 3 kg/m2) completed 12 weeks (4 sessions/week) of either HIIT (10 × 1-minute at 90%HRmax, 1-minute active recovery; n = 16) or MICT (45 minutes at 70%HRmax; n = 15). To assess the direct effects of exercise independent of weight/fat loss, participants were required to maintain body mass. Results Training increased peak oxygen uptake by ~10% in both HIIT and MICT (P &lt; 0.0001), and body weight/fat mass were unchanged. Peripheral insulin sensitivity (hyperinsulinemic-euglycemic clamp) was ~20% greater the day after the final exercise session compared to pretraining (P &lt; 0.01), with no difference between HIIT and MICT. When trained participants abstained from exercise for 4 days, insulin sensitivity returned to pretraining levels in both groups. HIIT and MICT also induced similar increases in abundance of many skeletal muscle proteins involved in mitochondrial respiration and lipid and carbohydrate metabolism. Training-induced alterations in muscle lipid profile were also similar between groups. Conclusion Despite large differences in training intensity and exercise time, 12 weeks of HIIT and MICT induce similar acute improvements in peripheral insulin sensitivity the day after exercise, and similar longer term metabolic adaptations in skeletal muscle in adults with obesity. These findings support the notion that the insulin-sensitizing effects of both HIIT and MICT are mediated by factors stemming from the most recent exercise session(s) rather than adaptations that accrue with training.

International Field Hockey Players Perform More High-Speed Running Than National-Level Counterparts

2012 ◽  
Vol 26 (4) ◽  
pp. 947-952 ◽  
Author(s):  
Denise H. Jennings ◽  
Stuart J. Cormack ◽  
Aaron J. Coutts ◽  
Robert J. Aughey
Keyword(s):  
High Speed ◽  
National Level ◽  
Field Hockey ◽  
Hockey Players

Abstract 18257: Cardiovascular Response to Energy Drink Consumption in Healthy Adults

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Anna Svatikova ◽  
Naima Covassin ◽  
Krishen Somers ◽  
Filip Soucek ◽  
Tomas Kara ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Cardiovascular Response ◽  
Energy Drinks ◽  
Energy Drink ◽  
Healthy Adults ◽  
Double Blind ◽  
Resting Blood Pressure ◽  
Energy Drink Consumption ◽  
Placebo Drink

Introduction: An increasing number of healthy adults consume energy drinks to enhance their physical and mental performance. Energy drinks contain caffeine and multiple other “natural” stimulants and their combined effects on cardiac hemodynamics in healthy individuals are unclear. Hypothesis: We hypothesized that drinking a commercially available energy drink, Rockstar , compared to a placebo drink, increases resting blood pressure and heart rate in healthy adults, and these increases would be further accentuated by stress conditions. Methods: We enrolled 25 healthy, normotensive subjects (14 males), aged 29±1 years, with body mass index 24.5±1 kg/m 2 , in a randomized, double-blind, placebo-controlled, crossover study. Each subject consumed a placebo drink and a commercially available Rockstar energy drink (473 ml), in random order on two separate study days. Blood pressure and heart rate responses were recorded and compared before and 30 minutes after drink consumption, both at rest and then in response to physical, mental and cold stressors. Results: The Rockstar energy drink induced a 6±1% increase in resting systolic blood pressure, compared to 3±1% with the placebo drink (P=0.0078). Diastolic blood pressure increased by 7±1% vs 0±1% with the placebo drink (P=0.0007; Figure 1). Heart rate increased similarly in both groups, by 5±2% in the energy drink group vs. 7±2% in the placebo group. Blood pressure and heart rate increases during the stress stimuli (sustained handgrip, mental stress and cold stress) did not differ between energy drink and placebo. Conclusions: Drinking a commercially available Rockstar energy drink significantly increases resting blood pressure in young healthy adults. Blood pressure increases are not further accentuated by exercise, mental or cold pressor stress stimuli. These hemodynamic changes induced by energy drink consumption could predispose to cardiovascular events.

Enhancing Physical Performance in Elite Junior Tennis Players With a Caffeinated Energy Drink

2015 ◽  
Vol 10 (3) ◽  
pp. 305-310 ◽  
Author(s):  
César Gallo-Salazar ◽  
Francisco Areces ◽  
Javier Abián-Vicén ◽  
Beatriz Lara ◽  
Juan José Salinero ◽  
...  
Keyword(s):  
Physical Performance ◽  
Handgrip Strength ◽  
Energy Drink ◽  
Maximal Velocity ◽  
Tennis Players ◽  
Ball Velocity ◽  
Junior Tennis ◽  
Elite Level ◽  
Gps Devices ◽  
Placebo Drink

The aim of this study was to investigate the effectiveness of a caffeinated energy drink to enhance physical performance in elite junior tennis players. In 2 different sessions separated by 1 wk, 14 young (16 ± 1 y) elite-level tennis players ingested 3 mg caffeine per kg body mass in the form of an energy drink or the same drink without caffeine (placebo). After 60 min, participants performed a handgrip-strength test, a maximal-velocity serving test, and an 8 × 15-m sprint test and then played a simulated singles match (best of 3 sets). Instantaneous running speed during the matches was assessed using global positioning (GPS) devices. Furthermore, the matches were videotaped and notated afterward. In comparison with the placebo drink, the ingestion of the caffeinated energy drink increased handgrip force by ~4.2% ± 7.2% (P = .03) in both hands, the running pace at high intensity (46.7 ± 28.5 vs 63.3 ± 27.7 m/h, P = .02), and the number of sprints (12.1 ± 1.7 vs 13.2 ± 1.7, P = .05) during the simulated match. There was a tendency for increased maximal running velocity during the sprint test (22.3 ± 2.0 vs 22.9 ± 2.1 km/h, P = .07) and higher percentage of points won on service with the caffeinated energy drink (49.7% ± 9.8% vs 56.4% ± 10.0%, P = .07) in comparison with the placebo drink. The energy drink did not improve ball velocity during the serving test (42.6 ± 4.8 vs 42.7 ± 5.0 m/s, P = .49). The preexercise ingestion of caffeinated energy drinks was effective to enhance some aspects of physical performance of elite junior tennis players.

Motion Characteristics of Division I College Field Hockey: Female Athletes in Motion (FAiM) Study

2015 ◽  
Vol 10 (4) ◽  
pp. 476-481 ◽  
Author(s):  
Jason D. Vescovi ◽  
Devon H. Frayne
Keyword(s):  
High Intensity ◽  
Female Athletes ◽  
Division I ◽  
Relative Distance ◽  
Moderate Intensity ◽  
Metabolic Power ◽  
Field Hockey ◽  
Cross Sectional ◽  
Power Characteristics ◽  
Playing Time

Purpose:To examine locomotor demands and metabolic-power characteristics of National Collegiate Athletic Association (NCAA) field hockey matches.Methods:Using a cross-sectional design, global positioning system (GPS) technology tracked Division I field hockey players from 6 teams during 1 regular-season match (68 player observations). An ANOVA compared locomotor demands and metabolic-power characteristics among positions. Paired t tests compared dependent variables between halves.Results:Defenders played 5−6 min more than midfielders, whereas midfielders played 6−7 min more than forwards. Defenders covered less relative distance (98 m/min) than forwards and midfielders (110−111 m/min), as well as more low-intensity running than forwards and less high-intensity running than midfielders. Lower mean metabolic power (9.3 W/kg) was observed for defenders than forwards and midfielders (10.4 W/kg). There was no difference in playing time between halves; however, all 3 positions had a reduction in relative distance (7−9%) and mean metabolic power (8−9%) during the second half.Conclusions:Despite more playing time, defenders covered less relative distance and had lower mean metabolic power than other positions. Moderate-intensity, high-intensity, and sprint distance were similar between positions, highlighting the greater relative demands on forwards because they tended to have the least amount of playing time. The reduction of key metrics during the second half was similar among positions and warrants further investigation. These initial results can be used to design position-specific drills or create small-sided games that replicate match demands for NCAA athletes, thus helping establish strategies for developing physiological ability of players at this level.

scholarly journals Intensity Classification of Drills for a Collegiate Women’s Lacrosse Team: An Observational Study

2019 ◽  
Vol 7 (3) ◽  
pp. 16 ◽  
Author(s):  
Kathryn H. Alphin ◽  
Brynn L. Hudgins ◽  
Jennifer A. Bunn
Keyword(s):  
High Intensity ◽  
Moderate Intensity ◽  
Low Intensity ◽  
Risk Of Injury ◽  
Reduce Risk ◽  
Gps Devices ◽  
Training Impulse ◽  
Intensity Classification ◽  
And Training

Background: Balancing training load helps prevent injury and maximize performance, but coaches do not often know the load or intensity of drills when making selections for practice. Objective: This study aimed to classify the drills of a women’s collegiate lacrosse team into low, moderate, and high intensity categories. Methods: Twenty-five participants wore global positioning system (GPS) devices and heart rate (HR) monitors daily during team practice and scrimmage matches. The data collected was trimmed to reflect only the time the players practiced and then organized by drill. Mean HR, distance rate, and training impulse (TRIMP) scores were used to classify drills into tertiles: low, moderate, and high intensity. Results: A total of 56 unique drills were analyzed over 33 training days, with 24 drills considered moderate intensity, 17 drills were high intensity, and 15 drills were low intensity. By position, 17 drills were low intensity for the midfielders, followed by 16 for the attacker, and 12 for the defenders and goalies. The defenders had the highest number of moderate intensity drills with 27, followed by the attackers with 24, midfielders with 21, and goalies with 17. Lastly, midfielders and goalies had the highest number of high intensity drills with 18, followed by attackers with 17, and defenders with 16. Conclusions: These results will help the coaching and training staff manage workloads and potentially reduce risk of injury and overtraining by giving insight into the demands of each drill they require of their athletes.

Sign in / Sign up

Export Citation Format

Share Document