Health club membership has increased

are you a native English speaker ?

please see the para below ....i don't understand this...

Health club membership has increased dramatically over the last five years. In order to take advantage of this increase, Fitness Express plans to open more of the same types of classes available during the week, while continuing its already very extensive advertising in newspapers and on the radio

>>Fitness Express plans to open more of the same types of classes available during the week

does it say Fitness Express is a plan which is similar to existing plan ?
this is confusing....please explain the meaning of the sentence.

>>while continuing its already very extensive advertising in newspapers
advertisement of what plan ?Fitness Express ?

please explain this part too.

thanks