CHANGES IN RECOVERY-STRESS STATE AND PERFORMANCE IN ELITE ROWERS DURING PREPARATION FOR MAJOR COMPETITIONS

2005 ◽  
Vol 101 (6) ◽  
pp. 375 ◽  
Author(s):  
PRIIT PURGE
Keyword(s):  
Stress State ◽  
Recovery Stress ◽  
Elite Rowers ◽  
And Performance

Changes in Recovery-Stress State and Performance in Elite Rowers during Preparation for Major Competitions

2005 ◽  
Vol 101 (2) ◽  
pp. 375-381 ◽  
Author(s):  
Priit Purge ◽  
Jaak Jürimäe ◽  
Toivo Jürimäe
Keyword(s):  
Stress State ◽  
Body Mass ◽  
Recovery Stress ◽  
Large Decrease ◽  
World Cup ◽  
Recovery Score ◽  
Elite Rowers ◽  
Stress Score ◽  
And Performance

This study investigated changes in the perceived recovery-stress state and performance in 6 highly trained Estonian rowers preparing for major competitions and representing Estonia in double sculls (age: M = 23.0, SD = 1.4 yr.; height: M = 198.0, SD = 0.0 cm; body mass: M = 97.1, SD = 6.4 kg), and quadruple sculls (age: M = 21.5, SD = 2.5 yr.; height: M = 189.5, SD = 5.4 cm; body mass: M = 90.9, SD = 4.8 kg). The subjects were training regularly and had been doing so for the last 10.5 yr. (double scullers, SD = 2.1 yr.) and 7.5 yr. (quadruple scullers, SD = 3.1 yr.), respectively. The Recovery-Stress Questionnaire for Athletes of Kellmann and Kallus was given two days before World Cup competitions. Standardized Stress and Standardized Recovery scores and RESTQ-Index were computed. In addition, resting Cortisol in blood was measured at the same time. The performance of both boat classes constantly decreased from World Cup 1 to World Cup 3 as indicated by percent losses for winning boats. Resting Cortisol and RESTQ-Index increased and decreased, respectively, at the same time. For double scullers, a decrease in RESTQ-Index mainly reflected the large decrease in the Standardized Recovery score. A decrease in RESTQ-Index was mainly based on a large increase in the Standardized Stress score for rowers performing in a quadruple scull. Present results indicate that the recovery-stress state affects performance of rowers in international competitions. RESTQ-Index could be used as the athletes' resource measure, while the Standardized Stress and Standardized Recovery scores reflect the athletes' extent of stress and recovery separately.

Relationships between Recovery-Stress State and Performance in Sprinters and Jumpers

2004 ◽  
Vol 99 (1) ◽  
pp. 12-16 ◽  
Author(s):  
Jane Kalda ◽  
Toivo Jürimäe ◽  
Jaak Jürimäe
Keyword(s):  
Stress State ◽  
Recovery Stress ◽  
And Performance

Recovery-Stress States of Professional Ballet Dancers During Different Phases of a Ballet Season

2021 ◽  
Author(s):  
Jana S. De Wet ◽  
Eileen Africa ◽  
Ranel Venter
Keyword(s):  
Mixed Model ◽  
High Stress ◽  
Recovery Stress ◽  
Total Recovery ◽  
Ballet Dancers ◽  
Training Adaptations ◽  
Stress States ◽  
Classical Ballet ◽  
And Performance ◽  
Negative Training

Ballet dancers are exposed to chronic high training and performance demands that are associated with overtraining syndrome and injury. Balancing high training loads with recovery to reduce the risk of negative training adaptations is critical. Moreover, the recovery-stress states of professional ballet dancers during training phases of a season are largely unknown. Professional dancers (n = 27) from one classical ballet company in South Africa were monitored for two 8-week phases of a ballet season. A recovery-stress questionnaire for Athletes (RESTQ-76 Sport) was completed weekly during the rehearsal phase (P1) and the performance phase (P2), which took place at the start and the end of the ballet season, respectively. Comparisons were calculated between phases, sexes, and levels of performance with a mixed-model ANOVA and between demographic variables with a one-way ANOVA. The performance phase was signified by lower total recovery (TR, p < 0.01) and higher total stress (TS, p < 0.01) for the group. Female dancers had significantly lower recovery scores than male dancers during P2 (p < 0.01). No differences between levels of performance were found. Subscales previously associated with overreaching and injury were identified in certain groups during P2. In conclusion, P2 was a critical period where dancers, especially females, experienced high stress and low recovery. This could increase the risk for injury and negative training adaptations.

scholarly journals Feasibility of Crosslinked Acrylic Shape Memory Polymer for a Thrombectomy Device

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Andrea D. Muschenborn ◽  
Keith Hearon ◽  
Brent L. Volk ◽  
Jordan W. Conway ◽  
Duncan J. Maitland
Keyword(s):  
Crosslink Density ◽  
Blood Clot ◽  
Shape Memory Polymer ◽  
Thermomechanical Properties ◽  
Recovery Stress ◽  
Element Analysis ◽  
Clot Removal ◽  
Acrylic Copolymers ◽  
Thrombectomy Device ◽  
And Performance

Purpose. To evaluate the feasibility of utilizing a system of SMP acrylates for a thrombectomy device by determining an optimal crosslink density that provides both adequate recovery stress for blood clot removal and sufficient strain capacity to enable catheter delivery. Methods. Four thermoset acrylic copolymers containing benzyl methacrylate (BzMA) and bisphenol A ethoxylate diacrylate (Mn∼512, BPA) were designed with differing thermomechanical properties. Finite element analysis (FEA) was performed to ensure that the materials were able to undergo the strains imposed by crimping, and fabricated devices were subjected to force-monitored crimping, constrained recovery, and bench-top thrombectomy. Results. Devices with 25 and 35 mole% BPA exhibited the highest recovery stress and the highest brittle response as they broke upon constrained recovery. On the contrary, the 15 mole% BPA devices endured all testing and their recovery stress (5 kPa) enabled successful bench-top thrombectomy in 2/3 times, compared to 0/3 for the devices with the lowest BPA content. Conclusion. While the 15 mole% BPA devices provided the best trade-off between device integrity and performance, other SMP systems that offer recovery stresses above 5 kPa without increasing brittleness to the point of causing device failure would be more suitable for this application.

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.

Relaxation and Recovery in Sport and Performance

2017 ◽  
Author(s):  
Maximilian Pelka ◽  
Michael Kellmann
Keyword(s):  
Cognitive Processes ◽  
Muscle Tension ◽  
Recovery Process ◽  
Relaxation Techniques ◽  
Recovery Stress ◽  
Starting Point ◽  
Recovery From Work ◽  
Stress States ◽  
And Performance ◽  
The Individual

The sport and performance environment is highly demanding for its actors. Therefore, recovery from work and sports requires special attention. Without adequate recovery, optimal performance is not attainable. It depends, however, on the individual what adequate recovery actually is. An extremely demanding event for someone may not be as demanding for someone else. Every individual perceives his or her environment differently and therefore has to choose his or her response or prevention strategy accordingly. Monitoring one’s recovery-stress states might be a promising starting point to establish individual baselines and further regulate training or work intensities. Relaxation in terms of implementing systematic relaxation techniques seems to be an adequate approach. These techniques can be divided into muscle-to-mind and mind-to-muscle techniques focusing either on the training of one’s sensitivity to muscle tension or on the cognitive processes involved in relaxation. Whether the recovery process is finally successful depends on if the chosen methods fit the purpose of recovery (i.e., response to cognitive or physical demands), the setting/circumstance (i.e., time and place), and how comfortable one feels with the specific recovery strategy.

Reliability Analysis of the Suspension Device in the Refit of a Tracked Vehicle

2014 ◽  
Vol 945-949 ◽  
pp. 1129-1134 ◽  
Author(s):  
Wei Sun ◽  
Bing Ma ◽  
Jin Ma ◽  
Yao Zhao
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Stress State ◽  
Reliability Analysis ◽  
Equilibrium Position ◽  
Performance Testing ◽  
Static Equilibrium ◽  
Tracked Vehicles ◽  
And Performance ◽  
Torsion Bar

To improve the flexibility performance of tracked vehicles, lots of jobs has been done in the refit of driveline. Therefore, tough risks are transferred to the strength and fatigue life of suspension device. Through analyzing the effect of driveline refit to the performance of suspension device, a scheme that enhancing the stiffness of the torsion bar is proposed. By using the MSC.Patran/Nastran software, the model of suspension device is constructed, via the simulation of the stress state and fatigue strength that is loaded on the main suspension parts at the static equilibrium position and the maximum stroke position of equilibrium elbow, and performance testing on actual roads, this scheme is considered to be reliable.

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