1. Energy and recovery © Pearson Publishing Tel 01223 350555

2. Energy systems Muscles need energy to work This energy is supplied by food and stored in the body, eg as glucose or adenosine triphosphate (ATP) There are three energy systems: –Creatine phosphate system (immediate energy) — provides energy quickly but does not last long –Lactic acid system (short-term energy) — provides energy quickly but lactic acid soon builds up and causes fatigue –Aerobic system (long-term energy) — provides energy for long periods but needs oxygen to work

3. Creatine phosphate system This is an anaerobic system — it does not use oxygen There are small amounts of high energy (ATP) stores in the muscles — these can be used instantly but they will not last long ATP energy stores allow 5-8 seconds of hard work We then use our creatine phosphate stores to create more ATP (ATP-CP) This gives about another 20 seconds of hard work The creatine phosphate system is used for bursts of explosive speed, eg running the 100m

4. Sample only! This is a sample presentation. You can get the full version at www.teach-stuff.co.uk Full package includes: –full presentation (7 slides) –lesson plan with objectives, teaching ideas and plenary suggestions –question sheet for students. 19 other GCSE PE presentations and lesson plans also available.