rambo wrote:i have to say the above statement completely outrageous.. creatine is naturally found in your own body and in food... so what your bascally implying is that foods for example like beef will be banned aswell.. what next will they be trying to ban. protien supplements.. to ban this supplement would be obseard, creatine supplements have to be one of the best if no the best natural sporting enhancers around... everyones free there opinion but frm my knowledge of the supplement and my experience i highly recommend this..
currently not on any type of creatine stack
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Creatine is a *waste material*. It's produced naturally in the body by the breakdown of proteins. We don't need any in the diet, in the same way we make all the cholesterol we need for our cell membranes.
The body has 5 energy systems:
ATP -> ADP + P and ENERGY (4 seconds)
CP + ADP -> C and ATP (recycles ADP from above, lasts another 4 seconds)
Glucose -> Lactic Acid and ENERGY
Lactic Acid and Oxygen -> CO2 and H2O and ENERGY (via Pyruvate ISTR) (these systems last about 20-45 mins depending on fitness ISTR)
Fat and Oxygen -> CO2 and H2O and ENERGY (indefinate supply of energy for fitness, it works out that the fat in the average fit body can supply about 100 hours of slow running/ fast walking ISTR)
ATP is the energy store within the muscle cells themselves, CP (Creatine Phosphate) regenerates ATP, but the effect lasts seconds. ATP and CP are needed for explosive power, like weights or the 100m. However, they are used up in less than 10 seconds and take a while (ISTR hours) to regenerate.
For BFT fitness it's the lactic acid and pyruvate systems we're concerned with. The problem is we burn sugar faster than we're bringing in oxygen to oxidise it all the way to CO2 and water (i.e. this is the "oxygen debt"). What we want to do is maximise the rate the lactic acid is oxidised to pyruvate and to increase the local oxygen stores in the muscles (myoglobin). This increases the aerobic threshold, allowing us to work at higher heart rates for longer.
To increase this you want to work at the threshold (80-90% of Max HR) for about 20-30 mins. If you're on the "fighting fit" programme, this is the purpose of the 30 minute fast runs.
For endurance purposes, it's maximising fat burning that counts. A mixture of continuous running (to maximise VO2max) and Intervals (to increase heart strength) is advised. For the fighting fit programme, the 45 minute (and 90 minute) runs and the intervals take care of this.
Please excuse the rambling,
Bryn