This is from Ivan Abdajiev. (former Bulgarian eighlifting coach.) I highlight the part I am interested in.
"…And those are the different shapes of muscles. We have one muscle that could be one after another one, when they’re parallel, . . . this is the different types of muscles. They all have a particular function, they all react to different things. For instance, when we
have slower, but heavier exercise, then those muscles are the ones that are doing the work. The ones that need speed and heaviness at the same time, then those parallel muscles are activated, because power or strength of the muscles depend on different things, different parameters.
The part of the muscle which is contracting is called sarcomere. The longer it is, the faster it reacts, the faster it contracts. The shorter it is, it could provide enormous strength, but in a longer period of time.
And there are muscle groups that can work without oxygen provided, anaerobically.
And there are those muscles who work aerobically, with oxygen.
For instance, when we have a sprinter or cross runner, this is the muscle which is activated .This is used for running and sprinting and longer running periods. Those two muscles which are located on both sides of the knee, they take part when sprinting is necessary, also called out of phase muscles. They turn food into energy without using
oxygen. When we are talking about longer distances, then the energy is formed using oxygen. So that the ones that are used for longer running distance, they have a bigger number of mitochondria. This is where the cycle of Krebs takes place and over 1,500 kilojoules of energy are formed.
And when we are talking about anaerobic working of the muscles, then we are talking about 60% less production of those mitochondria from the same amount of energy. So in the longer period, when we look at different training muscles, there are different muscles that are used for different groups and they are the ones who change their size
accordingly to the training system.
That is why when we change, when we are not lifting weights, when we are doing something else . . . if we say that on the upper picture the engine is the one that is used to lift weights, if we do something else not lifting weights we are using other muscle groups, in another exercise not weightlifting, those are the muscles that are being contracted…"
end quote.
My questions;
The part that is contracting is the sarcomere?
Does he not mean the fibres WITHIN the sarcomere?
Does his point about the length of the sarcomere point towards … that you should try to increase your range of motion? Does this mean that certain stretching exercises can be very usefull? If you lengthen your sarcomere, does that mean you could potentially improve the reflex speed of the muscle? And the relaxation speed?
Are these factors not as important as the maximal strength of the muscle when it comes to sprinters?
Help me out here please, I cant see the wood for the trees again. :o