AP BIOLOGY

Detailed explanation-1: -These ATP stores last only a few seconds after which the breakdown of PC provides energy for another 5-8 seconds of activity. Combined, the ATP-PC system can sustain all-out exercise for up to 10-15 seconds and it is during this time that the potential rate for power output is at its greatest.

Detailed explanation-2: -For the ATP-PC system the rest ratio is 1:10/12. This means that for every second of ‘work’ you need to allow 10 to 12 seconds for recovery. You can easily implement these sorts of sessions into your training program as you can easily get great work done within 20 minutes.

Detailed explanation-3: -ATP-PC system is predominantly used during maximum intensity activities lasting no longer than 10 seconds. Aerobic system is predominantly used during medium to low intensity activity. The predominant energy system being used at rest is the aerobic system.

Detailed explanation-4: -The use of the ATP-PC system lead to the fastest rate of fatigue, it should be used wisely. For sports and exercises that require explosive and powerful muscle contraction, there is a lot of interest in maximising phosphocreatine in the muscles to boost performance.

Detailed explanation-5: -As the fastest way to resynthesize ATP, the phosphagen system is the predominant metabolic energy system used for all-out exercise lasting up to about 10 seconds. However, since there is a limited amount of stored CP and ATP in skeletal muscles, fatigue occurs rapidly.