this will be a promising career for you. As personal trainers, we need to be ‘hands off’ but your training as a massage therapist will make you a great commodity.
You will need to get a personal training certification. Which one you choose is ultimately a matter of personal preference. I recommend to look for one that is NCCA accredited. If you pick NASM, ACE or ACSM, you cannot go wrong.
I have a personal preference for NASM. They have plenty of specialty certifications which are all based on a training system called OPT and thus form a coherent whole.
I wish you good luck.