When doing bicep curls, the first rep is relatively easy but eventually it becomes impossible to do a single curl.
After a rest, the muscle resets and can once again lift.
What is causing the muscle exhaustion and what is it that “resets” within the muscle?
In: 85
ALY5: let’s say you have a car with a full gas tank, but also has a long flexible tube connected to the gas station. You drive a few miles then run out of gas so you have to stop. Now you have to wait a bit for more gas to be pumped to the car from the gas station. Once the tank is full again you can keep going. Eventually the gas station will be empty and your engine will be overheating and worn out so you have to stop for longer to wait for fuel reserves to be replenished and to make repairs to the engine. Your bicep is the car/engine and the fuel is glycose/ATP/glycogen etc.
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