Washington.edu reported that:

Muscle cell number is affected by exercise level while young

and elitefitness.com said:

a trainee in the early stages of training would increase cell number

Where an unreferenced page on wikipedia said the opposite:

Contrary to popular belief, the number of muscle fibres cannot be increased through exercise.

Which one is true, I'm a little bit confused?

Note: I'm not asking about the increase in the cells' myofibril count, but the increase in the numbers of cells themselves.

Washington.edu reported that:

Muscle cell number is affected by exercise level while young

and elitefitness.com said:

a trainee in the early stages of training would increase cell number

Where an unreferenced page on wikipedia said the opposite:

Contrary to popular belief, the number of muscle fibres cannot be increased through exercise.

Which one is true, I'm a little bit confused?

Note: I'm not asking about the increase in the cells' myofibril count, but the increase in the numbers of cells themselves.

From http://staff.washington.edu/griffin/musclephys.txt

Muscle cell number is affected by exercise level while young

And http://www.elitefitness.com/forum/womens-fitness-female-bodybuilding-training/can-muscle-cells-increase-number-223312.html

a trainee in the early stages of training would increase cell number

Wikipedia (without a reference) says the opposite:

Contrary to popular belief, the number of muscle fibres cannot be increased through exercise.

Which is true?

(Not wondering about the increase in the cells' myofibril count, but increase in the numbers of cells themselves.)

Washington.edu reported that:

Muscle cell number is affected by exercise level while young

and elitefitness.com said:

a trainee in the early stages of training would increase cell number

Where an unreferenced page on wikipedia said the opposite:

Contrary to popular belief, the number of muscle fibres cannot be increased through exercise.

Which one is true, I'm a little bit confused?

Note: I'm not asking about the increase in the cells' myofibril count, but the increase in the numbers of cells themselves.

From http://staff.washington.edu/griffin/musclephys.txt

Muscle cell number is affected by exercise level while young

Wikipedia (without a reference) says the opposite:

Contrary to popular belief, the number of muscle fibres cannot be increased through exercise.

Which is true? If the former, is it only true in youth?

From http://staff.washington.edu/griffin/musclephys.txt

Muscle cell number is affected by exercise level while young

And http://www.elitefitness.com/forum/womens-fitness-female-bodybuilding-training/can-muscle-cells-increase-number-223312.html

a trainee in the early stages of training would increase cell number

Wikipedia (without a reference) says the opposite:

Contrary to popular belief, the number of muscle fibres cannot be increased through exercise.

Which is true?

(Not wondering about the increase in the cells' myofibril count, but increase in the numbers of cells themselves.)