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Träfflista för sökning "WFRF:(Hassmén Peter) srt2:(1995-1999)"

Sökning: WFRF:(Hassmén Peter) > (1995-1999)

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1.
  • Blomstrand, Eva, et al. (författare)
  • Influence of ingesting a solution of branched-chain amino acids on perceived exertion during exercise.
  • 1997
  • Ingår i: Acta Physiologica Scandinavica. - 0001-6772 .- 1365-201X. ; 159:1, s. 41-9
  • Tidskriftsartikel (refereegranskat)abstract
    • On two occasions, seven male endurance-trained cyclists performed exhaustive exercise on a cycle ergometer in the morning after they had performed a bout of exercise the preceding evening in an attempt to lower the muscle glycogen stores. The subjects exercised at a work rate corresponding to approximately 70% of their maximal oxygen uptake for 60 min, followed by another 20 min of maximal exercise. During exercise the subjects were given either a solution of branched-chain amino acids (BCAAs) or flavoured water (placebo). Every 10 min during exercise the subjects rated their perceived exertion and mental fatigue on two different Borg scales. During the 60 min exercise at a given work rate the subjects ratings of perceived exertion when they were given BCAAs were 7% lower, and their ratings of mental fatigue were 15% lower than when they were given placebo. In addition, the performance in the colour task of Stroops Colour Word Test performed after exercise was improved when BCAAs had been ingested during exercise, compared with the results from the placebo trial. There was no difference in the physical performance between the two trials measured as the amount of work done during the last 20 min of exercise when the subjects performed at their maximum. The plasma concentration ratio of free tryptophan/BCAAs, which increased by 45% during exercise and by 150% 5 min after exercise in the placebo trial, remained unchanged or even decreased when BCAAs were ingested.
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2.
  • Kenttä, Göran, et al. (författare)
  • Overtraining and recovery. A conceptual model.
  • 1998
  • Ingår i: Sports Medicine. - 0112-1642 .- 1179-2035. ; 26:1, s. 1-16
  • Tidskriftsartikel (refereegranskat)abstract
    • Fiercer competition between athletes and a wider knowledge of optimal training regimens dramatically influence current training methods. A single training bout per day was previously considered sufficient, whereas today athletes regularly train twice a day or more. Consequently, the number of athletes who are overtraining and have insufficient rest is increasing. Positive overtraining can be regarded as a natural process when the end result is adaptation and improved performance: the supercompensation principle--which includes the breakdown process (training) followed by the recovery process (rest)--is well known in sports. However, negative overtraining, causing maladaptation and other negative consequences such as staleness, can occur. Physiological, psychological, biochemical and immunological symptoms must be considered, both independently and together, to fully understand the 'staleness' syndrome. However, psychological testing may reveal early-warning signs more readily than the various physiological or immunological markers. The time frame of training and recovery is also important since the consequences of negative overtraining comprise an overtraining-response continuum from short to long term effects. An athlete failing to recover within 72 hours has presumably negatively overtrained and is in an overreached state. For an elite athlete to refrain from training for > 72 hours is extremely undesirable, highlighting the importance of a carefully monitored recovery process. There are many methods used to measure the training process but few with which to match the recovery process against it. One such framework for this is referred to as the total quality recovery (TQR) process. By using a TQR scale, structured around the scale developed for ratings of perceived exertion (RPE), the recovery process can be monitored and matched against the breakdown (training) process (TQR versus RPE). The TQR scale emphasises both the athlete's perception of recovery and the importance of active measures to improve the recovery process. Furthermore, directing attention to psychophysiological cues serves the same purpose as in RPE, i.e. increasing self-awareness. This article reviews and conceptualises the whole overtraining process. In doing so, it (i) aims to differentiate between the types of stress affecting an athlete's performance: (ii) identifies factors influencing an athlete's ability to adapt to physical training: (iii) structures the recovery process. The TQR method to facilitate monitoring of the recovery process is then suggested and a conceptual model that incorporates all of the important parameters for performance gain (adaptation) and loss (maladaptation).
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3.
  • Kenttä, Göran, 1965-, et al. (författare)
  • Träna smart : undvik överträningssyndrom
  • 1999
  • Bok (populärvet., debatt m.m.)abstract
    • Varför blir man övertränad? Om du vill bli bäst måste du träna mest och hårdast. Låter det välbekant? En viss sanning ligger det i detta påstående. För det går naturligtvis inte att bli framgångsrik inom någon idrott utan att träna mycket och hårt. Men nog så viktigt är att finna balansen mellan lagom träningsdos och återhämtning. Det är först när träning och återhämtning är i harmoni som den optimala prestationsutvecklingen är möjlig. Det gäller alltså att bli en träningsintelligent idrottare. Men när ambitionsnivån är på topp och kunskapen om träning och återhämtning är svag finns det istället risk för att drabbas av överträningssyndrom.(Text från SISU Idrottsböcker)
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