Preconditioning Strategy in Rugby-7s Players: Beneficial or Detrimental?

2019 ◽  
Vol 14 (7) ◽  
pp. 918-926 ◽  
Author(s):  
Bruno Marrier ◽  
Alexandre Durguerian ◽  
Julien Robineau ◽  
Mounir Chennaoui ◽  
Fabien Sauvet ◽  
...  
Keyword(s):  
Stress State ◽  
Testing Session ◽  
Recovery Stress ◽  
Match Play ◽  
Warm Up ◽  
Salivary Testosterone ◽  
Repeated Sprint ◽  
Psychophysiological State ◽  
Priming Exercise ◽  
Rugby Players

Purpose: Preconditioning strategies are considered opportunities to optimize performance on competition day. Although investigations conducted in rugby players on the effects of a morning preconditioning session have been done, additional work is warranted. The aim of this study was to monitor changes in physical and psychophysiological indicators among international Rugby-7s players after a priming exercise. Methods: In a randomized crossover design, 14 under-18 international Rugby-7s players completed, at 8:00 AM, a preconditioning session consisting of a warm-up followed by small-sided games, accelerations, and 2 × 50-m maximal sprints (Experimental), or no preloading session (Control). After a 2-h break, the players performed a set of six 30-m sprints and a Rugby-7s match. Recovery–stress state and salivary stress-marker levels were assessed before the preloading session (Pre), immediately after the preloading session (Post 1), before the testing session (Post 2), and after the testing session (Post 3). Results: Experimental–Control differences in performance across a repeated-sprint test consisting of six 30-m sprints were very likely trivial (+0.2, ±0.7%, 3/97/1%). During the match, the total distance covered and the frequency of decelerations were possibly lower (small) in Experimental compared with Control. Differences observed in the other parameters were unclear or possibly trivial. At Post 2, the perceived recovery–stress state was improved (small difference) in Experimental compared with Control. No difference in salivary cortisol response was observed, while the preconditioning session induced a higher stimulation of salivary testosterone and α-amylase. Conclusions: The players’ ability to repeat sprints and physical activity in match play did not improve, but their psychophysiological state was positively affected after the present preconditioning session.

Electrostimulation’s Enhancement of Recovery During a Rugby Preseason

2013 ◽  
Vol 8 (1) ◽  
pp. 92-98 ◽  
Author(s):  
C. Martyn Beaven ◽  
Christian Cook ◽  
David Gray ◽  
Paul Downes ◽  
Ian Murphy ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Stress State ◽  
Venous Blood ◽  
Combined Treatment ◽  
Venous Blood Flow ◽  
Recovery Stress ◽  
Compression Garment ◽  
Compression Garments ◽  
Salivary Testosterone ◽  
Rugby Players

Rugby preseason training involves high-volume strength and conditioning training, necessitating effective management of the recovery-stress state to avoid overtraining and maximize adaptive gains.Purpose:Compression garments and an electrostimulation device have been proposed to improve recovery by increasing venous blood flow. These devices were assessed using salivary testosterone and cortisol, plasma creatine kinase, and player questionnaires to determine sleep quality, energy level, mood, and enthusiasm.Methods:Twenty-five professional rugby players were assigned to 1 of 2 treatments (compression garment or a concurrent combination of electrostimulation and compression) in a crossover design over 2 × 2-wk training blocks.Results:Substantial benefits were observed in self-assessed energy levels (effect size [ES] 0.86), and enthusiasm (ES 0.80) as a result of the combined treatment when compared with compression-garment use. The combination treatment had no discernable effect on salivary hormones, with no treatment effect observed. The electrostimulation device did tend to accelerate the return of creatine kinase to baseline levels after 2 preseason rugby games when compared with the compression-garment intervention (ES 0.61; P = .08).Conclusions:Electrostimulation elicited psychometric and physiological benefits reflective of an improved recovery-stress state in professional male rugby players when combined with a lower-body compression garment.

A Comparison of Different Modes of Morning Priming Exercise on Afternoon Performance

2016 ◽  
Vol 11 (6) ◽  
pp. 763-767 ◽  
Author(s):  
Mark Russell ◽  
Aden King ◽  
Richard. M. Bracken ◽  
Christian. J. Cook ◽  
Thibault Giroud ◽  
...  
Keyword(s):  
Reaction Time ◽  
Rugby Union ◽  
Jump Height ◽  
Countermovement Jump ◽  
Repeated Sprint ◽  
Mass Load ◽  
Hormone Responses ◽  
Sprint Cycling ◽  
Priming Exercise ◽  
Rugby Players

Purpose:To assess the effects of different modes of morning (AM) exercise on afternoon (PM) performance and salivary hormone responses in professional rugby union players.Methods:On 4 occasions (randomized, crossover design), 15 professional rugby players provided AM (~8 AM) and PM (~2 PM) saliva samples before PM assessments of countermovement-jump height, reaction time, and repeated-sprint ability. Control (passive rest), weights (bench press: 5 × 10 repetitions, 75% 1-repetition maximum, 90-s intraset recovery), cycling (6 × 6-s maximal sprint cycling, 7.5% body mass load, 54-s intraset recovery), and running (6 × 40-m maximal sprints, 20-s intraset recovery) interventions preceded (~5 h) PM testing.Results:PM sprint performance improved (P < .05) after weights (>0.15 ± 0.19 s, >2.04% ± 2.46%) and running (>0.15 ± 0.17 s, >2.12% ± 2.22%) but not cycling (P > .05). PM jump height increased after cycling (0.012 ± 0.009 m, 2.31% ± 1.76%, P < .001) and running (0.020 ± 0.009 m, 3.90% ± 1.79%, P < .001) but not weights (P = .936). Reaction time remained unchanged between trials (P = .379). Relative to control (131 ± 21 pg/mL), PM testosterone was greater in weights (21 ± 23 pg/mL, 17% ± 18%, P = .002) and running (28 ± 26 pg/mL, 22% ± 20%, P = .001) but not cycling (P = .072). Salivary cortisol was unaffected by AM exercise (P = .540).Conclusions:All modes of AM exercise improved at least 1 marker of PM performance, but running appeared the most beneficial to professional rugby union players. A rationale therefore exists for preceding PM competition with AM exercise.

scholarly journals Repeated sprint ability (RSA) performance is not related to body height and body weight measurements among perak sukma 2018 male rugby players

2019 ◽  
Vol 10 (SPL1) ◽  
Author(s):  
Nor Fazila Abd Malek ◽  
Nur Ikhwan Mohamad ◽  
Mohansundar Sankaravel2 ◽  
Sakinah Mohd Hassan
Keyword(s):  
Body Weight ◽  
Pearson Correlation ◽  
Body Height ◽  
Anthropometric Measures ◽  
Actual Performance ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
The Relationship ◽  
Rugby Players ◽  
Sprint Ability

Repeated sprint ability (RSA) is typically used for speed-endurance and agility-endurance training and assessment. RSA is preferred as it mimics actual performance during competition. RSA test involves straight sprint and quick turning movements. Thus, the aim of this study is to determine the relationship between height and body weight measurements on RSA performance, as height and weight may influence the mechanical properties of it. Ten male rugby players (body weight 72.99 ± 14.29 kg, height 169 ± 5.55 cm) selected for Perak SUKMA 2018 team were assessed during centralized training ~9 months prior to their competition.  Body weight and height were measured using standard laboratory weight and height scales prior to the RSA test. RSA were hand-timed for 5 repetitions x 2 sets x 60 seconds rest in between repetitions x 5 minutes rest in-between set. The sprints were performed in the evenings, on grass surface with participants wearing full playing attire. Standardized pre-game warm-up and cooling down were performed. Data recorded was analyzed statistically using a t-test comparison for set one versus set two performances. Pearson correlation coefficient was used to analyze the relationship between anthropometric measures and the RSA test. RSA performance has a negative correlation with the athletes’ height (r= -0.233 set 1, r = -0.435 set 2) and body weight (r= -0.556 set 1, r= -0.629 set 2). RSA performance was significantly different between set 1 and set 2 (p=0.001), with set 1 performance better than set 2. Body height and body weight did not influence RSA performance. Athletes involved did not have adequate speed-agility-endurance needed. In practical, selecting athletes based on their body height and body weight with the assumption that taller and heavier athletes may perform better may not be suitable for this kind of sport. On the other hand, using RSA to test and develop the speed-agility-endurance ability for rugby players is suggested.  

Development of a Soccer Simulation Protocol to Include Repeated Sprints and Agility

2011 ◽  
Vol 6 (3) ◽  
pp. 427-431 ◽  
Author(s):  
Keeron J. Stone ◽  
Jonathan L. Oliver ◽  
Michael G. Hughes ◽  
Michael R. Stembridge ◽  
Daniel J. Newcombe ◽  
...  
Keyword(s):  
Match Play ◽  
Heart Rates ◽  
Repeated Sprints ◽  
Soccer Match ◽  
Repeated Sprint ◽  
Movement Characteristics ◽  
Simulation Protocol ◽  
And Performance

Existing procedures for the simulation of soccer match play fail to incorporate multidirectional and repeated-sprint activities, even though these movements are considered fundamental to match play. In the current study, selected physiological and performance responses were assessed during an adapted version of an existing soccer simulation protocol. Mean heart rates of 163 ± 14 beats·min–1, mean blood lactates of 4.9 ± 2.3 mmol·L-1 and decrements in single-sprint and repeated-sprint performances were observed. The presented adaptations to an existing soccer simulation protocol better reflect the movement characteristics as well as the physiological and performance responses of soccer match play.

Relations among Heavy Training Stress, Mood State, and Performance for Male Junior Rowers

2002 ◽  
Vol 95 (2) ◽  
pp. 520-526 ◽  
Author(s):  
Jaak Jürimäe ◽  
Jarek Mäestu ◽  
Priit Purge ◽  
Toivo Jürimäe ◽  
Terje Sööt
Keyword(s):  
Stress State ◽  
Cortisol Level ◽  
Social Stress ◽  
Mood State ◽  
Personal Accomplishment ◽  
Training Period ◽  
Training Volume ◽  
Recovery Stress ◽  
Training Stress ◽  
Heavy Training

This study investigated the influence of rapidly increased training volume on performance and recovery-stress state perceived by 10 male junior rowers. The training during the 6-day period amounted to 21.5 ± 2.2 hr., which was equivalent to an average increase in training load by approximately 100% compared to their average training volume during the previous 4 wk. The time to row 2,000 m on a rowing ergometer and resting cortisol level were significantly increased after the 6-day training period. Scores on subscales of the Recovery Stress Questionnaire for Athletes significantly increased for somatic component of stress (Fatigue) and decreased factor indicating recovery (Social Relaxation) after the heavy training period. A correlation of .63 was found between increased training volume and scores on the Conflicts/Pressure subscale at the end of the heavy training period. Correlations were also found between changes in training volume with changes on subscales of Sleep Quality ( r = −.64) and Burnout/Personal Accomplishment ( r = −.66). Changes in resting cortisol levels as a result of heavy training stress were related to the changes in the following stress subscales: Social Stress ( r = .76), Fatigue ( r = .64), Disturbed Breaks ( r = .65), and Fitness/Injury ( r = 67). Changes in performance, perceived recovery-stress state and resting plasma cortisol level reflect increased stress due to high training. These results suggest that the Recovery Stress Questionnaire for Athletes could be used to evaluate the effects of rapidly increased training volume for male junior rowers.

Increased Blood pH but Not Performance With Sodium Bicarbonate Supplementation in Elite Rugby Union Players

2010 ◽  
Vol 20 (4) ◽  
pp. 307-321 ◽  
Author(s):  
Sonya L. Cameron ◽  
Rebecca T. McLay-Cooke ◽  
Rachel C. Brown ◽  
Andrew R. Gray ◽  
Kirsty A. Fairbairn
Keyword(s):  
Sodium Bicarbonate ◽  
High Intensity ◽  
Rugby Union ◽  
Placebo Condition ◽  
Double Blind ◽  
Warm Up ◽  
Blood Ph ◽  
Gi Symptoms ◽  
Improve Exercise Performance ◽  
Rugby Players

Purpose:This study investigated the effect of ingesting 0.3 g/kg body weight (BW) of sodium bicarbonate (NaHCO3) on physiological responses, gastrointestinal (GI) tolerability, and sprint performance in elite rugby union players.Methods:Twenty-five male rugby players, age 21.6 (2.6) yr, participated in a randomized, double-blind, placebo-controlled crossover trial. Sixty-five minutes after consuming 0.3 g/kg BW of either NaHCO3 or placebo, participants completed a 25-min warm-up followed by 9 min of high-intensity rugby-specific training followed by a rugby-specific repeated-sprint test (RSRST). Whole-blood samples were collected to determine lactate and bicarbonate concentrations and pH at baseline, after supplement ingestion, and immediately after the RSRST. Acute GI discomfort was assessed by questionnaire throughout the trials, and chronic GI discomfort was assessed during the 24 hr postingestion.Results:After supplement ingestion and immediately after the RSRST, blood HCO3 − concentration and pH were higher for the NaHCO3 condition than for the placebo condition (p < .001). After the RSRST, blood lactate concentrations were significantly higher for the NaHCO3 than for the placebo condition (p < .001). There was no difference in performance on the RSRST between the 2 conditions. The incidence of belching, stomachache, diarrhea, stomach bloating, and nausea was higher after ingestion of NaHCO3 than with placebo (all p < .050). The severity of stomach cramps, belching, stomachache, bowel urgency, diarrhea, vomiting, stomach bloating, and flatulence was rated worse after ingestion of NaHCO3 than with placebo (p < .050).Conclusions:NaHCO3 supplementation increased blood HCO3 − concentration and attenuated the decline in blood pH compared with placebo during high-intensity exercise in well-trained rugby players but did not significantly improve exercise performance. The higher incidence and greater severity of GI symptoms after ingestion of NaHCO3 may negatively affect physical performance, and the authors strongly recommend testing this supplement during training before use in competitive situations.

Effects of Static Stretching in Warm-Up on Repeated Sprint Performance

2009 ◽  
Vol 23 (7) ◽  
pp. 2155-2162 ◽  
Author(s):  
Aaron Y Sim ◽  
Brian T Dawson ◽  
Kym J Guelfi ◽  
Karen E Wallman ◽  
Warren B Young
Keyword(s):  
Sprint Performance ◽  
Static Stretching ◽  
Warm Up ◽  
Repeated Sprint

Effects of static stretching in warm-up on repeated sprint performance

2009 ◽  
Vol 12 ◽  
pp. S60 ◽  
Author(s):  
B. Dawson ◽  
A. Sim ◽  
K. Wallman ◽  
K. Guelfi ◽  
W. Young
Keyword(s):  
Sprint Performance ◽  
Static Stretching ◽  
Warm Up ◽  
Repeated Sprint

scholarly journals Acute Effects of a Static vs. a Dynamic Stretching Warm-up on Repeated-Sprint Performance in Female Handball Players

2020 ◽  
Vol 72 (1) ◽  
pp. 161-172 ◽  
Author(s):  
Piotr Zmijewski ◽  
Patrycja Lipinska ◽  
Anna Czajkowska ◽  
Anna Mróz ◽  
Paweł Kapuściński ◽  
...  
Keyword(s):  
Average Power ◽  
Young Female ◽  
Sprint Performance ◽  
Lower Limbs ◽  
Static Stretching ◽  
Linear Modeling ◽  
Range Of Movement ◽  
Warm Up ◽  
Dynamic Stretching ◽  
Repeated Sprint

AbstractThis randomized cross-over study examined the effects of typical static and dynamic stretching warm-up protocols on repeated-sprint performance. Thirteen young female handball players performed a 5 min aerobic warm-up followed by one of three stretching protocols for the lower limbs: (1) static stretching, (2) dynamic-ballistic stretching, and (3) no stretching before performing five all-out sprints on a cycle ergometer. Each protocol was performed on a different occasion, separated by 2-3 days. Range of movement (ROM) was also measured before and after the warm-up protocols with a sit-and-reach test. Fixed and random effects of each stretching protocol on repeated sprint performance were estimated with mixed linear modeling and data were evaluated via standardization and magnitude-based inferences. In comparison to no stretching, there were small increases in ROM after dynamic stretching (12.7%, ±0.7%; mean, ±90% confidence limits) and static stretching (19.2%, ±0.9%). There were small increases in the average power across all sprints with dynamic stretching relative to static stretching (3.3%, ±2.4%) and no stretching (3.0%, ±2.4%) and trivial to small increases in the average power in the 1st and 5th trials with dynamic stretching compared to static stretching (3.9%, ±2.6%; 2.6%, ±2.6%, respectively) and no stretching (2.0%, ±2.7%; 4.1%, ±2.8%, respectively). There were also trivial and small decreases in power across all sprints with static relative to dynamic stretching (-1.3%, ±2.8%) and no stretching (-3.5%, ±2.9%). Dynamic stretching improved repeated-sprint performance to a greater extent than static stretching and no stretching.

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