Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0015672 (fatigue)
 51,768 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This study was designed to investigate and to compare the acute alterations in selected measures of mood profile in novice Taekwondo practitioners while evaluating whether dynamic Taekwondo practice was an appropriate exercise modality for enhancing six psychological state dimensions: Vigor, Anxiety, Depression, Anger, Fatigue, and Confusion. 20 male and female college-age students enrolled in Taekwondo activity class and an additional 20 students enrolled in the lecture-con trol class (ages 18 to 21 years) completed the Profile of Mood States (POMS) inven tory prior to and immediately following one 75-min. session of dynamic Taekwondo or lecture. To examine the exercise effect, a series of 2 x 2 analysis of covariance were performed on mean posttest scores, using pretest scores as the covariate. Analysis indicated that Taekwondo participants reported a significant improvement (p<.007) with respect to the control group in scores on Tension, Depression, Anger, Fatigue, Confusion, and Vigor. Also, Total Mood Disturbance significantly improved after the dynamic Taekwondo session. The selected affective benefits of an acute Taekwondo exercise in this study were independent of sex. Unlike the exercising subjects. the control subjects reported no such benefits and, indeed, increased their scores for negative mood states. These results suggest that a dynamic version of Taekwondo achieves the necessary activity parameters that begin to induce positive mood state changes and that extensive Taekwondo skill is not necessary to elicit some beneficial change in affect. This study also supports the findings of several earlier studies indicating that acute exercise may elicit positive changes in affective states and that prolonged exercise is not necessary to produce immediate beneficial alterations of mood.
Percept Mot Skills 2001 Jun
PMID:Alterations in selected measures of mood with a single bout of dynamic Taekwondo exercise in college-age students. 1156 11

We studied muscle fatigue development using evoked myoelectrical potentials superimposed on volitional ones. The instantaneous frequency of superim posed M-waves and mean power frequencies of volitional electromyography (EMG) declined during sustained contraction, indicating that fatigue progressed. We divided fatigue into 3 phases, with 20 frames in each fatigue phase, corresponding to one-third of the total sample. The instantaneous frequency of superimposed M-waves and mean power frequencies of volitional EMG were correlated during early intensive isometric voluntary contractions and became increasingly uncorrelated as contraction proceeded. The coefficient between the mean power frequency and instantaneous frequency correlation was also greater at the first peak than at the second peak of the superimposed M-wave, indicating that the motor unit action potential was distorted. Distortion in the motor unit action potential shape depends on elongation of the depolarization zone of muscle fiber, because the superimposed M-wave is a peripheral indicator elicited by electrical stimulation. These results suggest that muscle fatigue develops based on the reduction of the conduction velocity of muscle fiber and on the elongation of the depolarization zone of muscle fiber.
Percept Mot Skills 2001 Aug
PMID:Development of muscle fatigue assessed by using superposition of evoked and volitional myoelectric potentials. 1169 99

One potential contributing factor to the commonly observed home advantage in competitive sport is that officials may be biased in favour of the home team as a result of pressure from spectators. The present study examined officiating behaviour and home advantage, defined as home teams winning over 50% of decided games in English Club Cricket, a sport virtually devoid of spectator influence. Records of game outcomes, as well as dismissals requiring a decision by the umpire, were analysed. The relative frequency of umpiring decisions did not favour either home or away teams. However, a home advantage was found, with the home teams winning 57.1% of decided games (n = 1.449). Considered together, the results suggest that in sports with little or no spectator influence teams may win more often at home for reasons other than biased umpiring decisions, such as familiarity with their home ground or a visiting team's fatigue following travel.
Percept Mot Skills 2001 Oct
PMID:Game location and officiating bias in English Club Cricket. 1176 90

A significant effect of fatigue induced byphysical exercise leading to exhaustion was observed for 6 male triathletes using some specific analysis of the critical flicker fusion test.
Percept Mot Skills 2002 Feb
PMID:Influence of physical exercise on perceptual response in aerobically trained subjects. 1188 91

Mood states have been shown to be sensitive to periods of overtraining among endurance athletes. To examine the relationship between training volume and specific mood states, the Profile of Mood States was administered biweekly to 12 male and 17 female collegiate swimmers over the course of a competitive season. Pearson correlations were estimates of the relationship between mean subscores and training volume. Mean training volume for the comparison periods ranged from 3,868 to 12,500 meters/day. Mean ratings of both Anger and Vigor were significantly negatively correlated with training volume (-.58 and -.54, respectively). In addition, Fatigue was significantly correlated with training volume (r=.53), but the mean subscores for Tension, Depression, Confusion, and Global Mood were not significantly correlated with training volume. Results support previous research reporting mood disturbances with increased training volumes but do not support suggestions of an increased tendency towards higher scores on depression.
Percept Mot Skills 2002 Jun
PMID:Relationship between training volume and mood states in competitive swimmers during a 24-week season. 1208 Dec 60

26 participants completed a mood measure to assess anger, confusion, depression, fatigue, tension, and vigor immediately before and immediately after two exercise sessions. Analysis showed significant mood enhancement for each exercise session. Follow-up univariate results indicated that Depressed mood scores were reduced significantly and Fatigue scores increased significantly following the first exercise session. Scores after the second exercise session indicated that Depressed mood decreased significantly. There was no interaction. Results lend support for the notion that exercise reduces depressed mood scores. It is suggested that researchers should consider the mechanisms that produce changes in mood following exercise.
Percept Mot Skills 2002 Jun
PMID:Mood changes following exercise. 1208 Dec 73

This study assessed the effect of a nitrogen-oxygen (N2-02) saturation diving environment on nocturnal sleep and the differences in sleep on diving depth. We measured and recorded the standard polysomnograph and heart rate for a total of 459 nights on 27 divers who performed the N2-O2 saturation simulation dive an 20- and 30-m equivalent depths as well as their subjective feelings of fatigue. From the last half of the period on the bottom to the postdive period of both saturation diving depths, our main findings included a prolongation of sleep latency, shortened total sleep time, a decreased sleep efficiency index, and increased feelings of fatigue. During the bottom period and decompression period, the total number of awakenings and the awakenings from rapid eyes movement (REM) sleep increased. This was slightly greater at the 30-m equivalent depth. From these facts, we assumed that the deterioration of sleep at the 20- and 30-m nitrox saturation dives was predominantly relative to being restricted in a closed environment for a long time and the lack of physical activity of the divers. No recovery of sleep was observed in the postdive period. A difference in the effects on sleep by the dive depth was not found.
Percept Mot Skills 2002 Jun
PMID:Changes in sleep patterns during simulated nitrox saturation diving to 20 and 30 meters. 1208 Dec 78

The present study compared the predictive effectiveness of mood states and the Positive and Negative Affect Schedule models of mood. 38 junior high school students completed the Brunel University Mood Scale to assess anger, confusion, depression, fatigue, tension, and vigor and the PANAS 5 min. before a fitness test. Performance was self-referenced by comparing fitness test scores with a previous best score assessed four weeks earlier. Participants who equaled or bettered their previous best score were classified as Successful. Those who did not match their previous score were classified as Unsuccessful. Discriminant function analysis indicated that 31 participants (81.6%) could be correctly classified as Successful or Unsuccessful based on preperformance Brunel Mood scores. Discriminant function coefficients indicated that Confusion, Fatigue, and Vigor contributed significantly to the discrimination. For the Positive and Negative Affect Schedule, discriminant function analysis indicated that 26 participants (68.4%) could be correctly classified as Successful or Unsuccessful, with Negative Affect and Positive Affect contributing significantly to the discrimination. Summarizing negative mood into a single factor may lead to a substantial loss of information. Research on mood and performance relationships should use the mood dimensions assessed in the Brunel University Mood Scale rather than the Positive and Negative Affect Schedule.
Percept Mot Skills 2002 Jun
PMID:Predictive effectiveness of mood measures. 1208 Dec 82

This study examined the influence of postcompetition depressed mood on the intensity of other mood dimensions assessed by the Profile of Mood States and relationships between mood and satisfaction with performance. 195 distance runners completed the Brunel Mood Scale which is a 24-item measure assessing anger, confusion, depression, fatigue, tension, and vigor, and a Performance Satisfaction questionnaire immediately after running a 10-mi. race. To examine the proposed moderating effect of depression, participants were separated into a No-depression group of 133 and a Depressed Mood group of 62. Multivariate analysis of variance indicated that the Depressed Mood group reported significantly higher scores on Anger, Contusion, Fatigue, and Tension and lower Vigor scores than the No-depression group t ratios indicated that poorer performance was associated with higher Depression scores. Standard multiple regression to predict Performance Satisfaction scores from postcompetition scores on Anger, Confusion, Fatigue, Tension, and Vigor in the No-depression group indicated that only 1% (Adj. R2=.01, p>.05) of the variance was explained. By contrast, in the Depressed Mood group, the same mood dimensions predicted 27.5% of the variance in Performance Satisfaction scores (Adj. R2=.275, p<.01) with Anger (Beta=.63, p<.001), and Confusion (Beta=.44, p<.05) being significant predictors. Present findings support the notion that depressed mood is related to the intensity of other mood dimensions assessed by the Profile of Mood States and moderates relationships between those scores and performance satisfaction.
Percept Mot Skills 2002 Jun
PMID:Performance satisfaction and postcompetition mood among runners: moderating effects of depression. 1208 Dec 85

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.
Percept Mot Skills 2002 Oct
PMID:Relations among heavy training stress, mood state, and performance for male junior rowers. 1243 45


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>