It is this build up of lactic acid that causes the pain, heaviness, feeling of exhaustion, deadened muscles, and 'muscles will not work or go any faster' sensation. I am also interested in this idea because in horses there is a condition known as azoturia (tying up), which does not have an obvious human parallel.
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A network interface card (NIC) is a computer circuit board or card that is installed in a computer so that it can be connected to a network. A WAN interface card (WIC) is a specialized network interface card that allows devices to connect to a wide area network.