hi can i know if personal trainer still can earn a decent income in klang valley ?

all the personal trainers i know do something else on the side to supplement their incomes so i guess not so much.

hmm what about those that work full time in gym such as fitness first ??

income working with commercial gym such as celebrity fitness and fitness first is depend on how much session you can sell and how many clients you train per month.

If you can sell around 80 session per month and train 90 hours, you can make around 6k plus. But depend on other factor like what is your level, the total amount of session you sell and etc.