A muscle that feels hard is a result of muscle flexion. When a muscle is flexed, or more generally, is forced to work, its texture becomes less pliable (more hard). This can be accomplished for short periods of time by creating tension on a muscle by putting a weight load on it or by flexing the muscle using the conjugate muscle to create that tension.
Muscle tone is an involuntary continuous tension that a muscle has when it experiences strenuous activity over a prolonged period of time. This can make a muscle feel like it is at least partially flexed all the time, even when the muscle's owner isn't consciously doing anything to flex it. Hard, toned muscles are often considered a positive indicator of physical muscular fitness.
excerice
no
The lower the weights, the stronger and leaner your muscles will become with more repetitions. If you want bigger muscles, you should try heavier weights.
Lift weights with them
poseidon
milk
i don no
bigger muscles
The gymnast have more muscles but the foot ball player has bigger muscles.
contacting and retracting. actually they are also breaking slightly when you exercise, that way, when they heal the heal bigger and better. (hence, bigger muscles)
Chicken
get bigger muscles