8 × 300 metres - 3 minutes recovery (lactate.Recovery - until pace significantly slows 150-metre intervals at 400-metre pace - 20 seconds.5 to 8 × 300 metres fast - 45 seconds recovery.The accumulation of hydrogen ions is the limiting factor causing fatigue in 300 metres to 800 metres. Once the CP stores are depleted the body resorts to stored glucose for ATP, the breakdown of glucose or glycogen in anaerobic conditions results in lactate and hydrogen ions production. (1994) with a group of subjects who performed six-second sprints with recovery intervals from 15 to 180 seconds found that there is an 81% recovery in peak power output (PPO) with a one-minute recovery and a 92% recovery of PPO in three minutes. The length of recovery between repetitions is vital in recovering power output through CP's resynthesis. (Phosphocreatine + ADP) ⇒ (Creatine Phosphokinase) ⇒ (Creatine + ATP).20 × 20 metres shuttle runs with 45 seconds.15 × 60 metres with 60 seconds recovery.3 × 10 × 30 metres with a recovery of 30.High-intensity work at near peak velocity are required e.g. To develop this energy system, sessions of 4 to 8 seconds of
Gives us around 5 to 8 seconds of ATP production. Will continue until CP stores in the muscles are depleted, approximately 4 to 6 seconds. The resynthesis of ATP from Creatine Phosphate (CP)
The thresholds (T) indicate that the energy system is exhausted -Īdenosine Triphosphate (ATP) stores in the muscle last forĪpproximately 2 seconds. (2000), shows how the energy systemsĬontribute to the manufacture of ATP when exercising at 100% effort. The carbohydrate store will last approximately 90 minutes, and the freeĪll three energy systems contribute at the start of exercise, but the contribution depends on the individual, the effort applied, or the rate at which energy is used.ĭavis et al.
Requires the complete oxidation of carbohydrates or free fatty acids in the ActivelyĬontracting muscles obtain ATP from glucose stored in the bloodstream and theīreakdown of glycogen stored in the muscles. The result of muscle contraction produces ADP which, whenĬoupled with CP regenerates ATP. When working at 95% effort, these energy pathways are time-limited and the consensus on these times are as follows: Duration Prime energy source during endurance activities This system produces ATP copiously and is the O2 means aerobic running in which ATP is manufacturedįrom food, mainly sugar and fat.It is the protons produced at the same time that restricts further However, Noakes in South Africa has discovered thatĪlthough excessive lactate production is part of the extreme fatigue process, The combinationįatiguing metabolite of the lactic acid system resulting from the incompleteīreakdown of glucose. The muscle, which when broken down aids in the manufacture of ATP. CP - Creatine Phosphate: a chemical compound stored in.The breakdown of ATP produces energy and ADP. Only from the energy released by this compound's breakdown can the cells perform work. ATP - Adenosine Triphosphate: a complex chemical compoundįormed with the energy released from food and stored in all cells, particularly.Requirements of various sports into the following "energy pathways": ATP-CP and There is a relationship between exercise intensity and the energy source. Gentle jogging, means that an athlete can sustain activity for an extended period. Very high-intensity, as in sprinting, means that an athlete can operateĮffectively for only a very short period whereas running at a low-intensity, as in Energy production is both time and intensity related.