A Level PE - Fatigue and the Recovery Process:

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  • Created by: hotzmc
  • Created on: 21-12-17 00:20

 A Level PE - Fatigue and the Recovery Process:

Fatigue: A feeling of extreme physical or mental tiredness and it can result in temporary loss of strength and energy

Causes of Fatigue:

  • Glycogen Depletion: When the body runs out of glycogen stores, therefore lacks energy
  • Lactic Acid Build Up: When there is not enough oxygen in the body, so lactase is made so that the muscles can continue to work
  • Reduced Rate of ATP Synthesis: When ATP and PC are depleted, it’s difficult to sustain muscular contractions due to lack of energy being made 
  • Dehydration: Causes blood viscosity to increase, causes blood pressure to reduce, we sweat less to prevent water loss, core body temperature increases
  • Lack of Rest Between Sessions: The body hasn’t had time to recover and replenishes oxygen and ATP stores

How Does Fatigue Affect Sporting Performance:

  • Contraction levels will decrease
  • Likely to make more mistakes due to worse judgement
  • Local muscle fatigue will mean specific muscles won’t be able to carry on what they’re doing
  • Temporary loss of strength and energy
  • Skill levels will decrease alongside the decline in speed and strength

Onset Blood Lactate Accumulation (OBLA):

  • The point during exercise at which lactic acid builds up in your blood and fatigue sets in
  • When you ‘hit a wall’
  • Also known as the Lactate Threshold
  • Reached when 85% of MHR
  • Is expressed as a % of VO2max (VO2max

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