Well from the perspective of being a bit heavier and then slimming down/getting fit it is quite good to be able to say to clients that you've done it yourself, so you can relate to them and they know you've been through it too.
I was just a mad keen amature and I found (after looking around for a long time) that my local Uni did the courses I wanted part time and I could fit them in around my regular job. I started with CYQ LEVEL 2 Gym Instructor - that was one morning a week for 10 weeks, then a month home revision and then the assessment day.
And then did the Personal Trainer CYQ Level 3 a couple of months later, and Exercise to Music level 2. Both taught in the same part time basis at the uni.
If you go to the gym and do aerobics the level 2 qualifications come quite naturally, the level 3 was harder work, but as it's my favourite subject it was a pleasure!
Then I just applied to local gyms for a job. Some gyms will continue to train you when your employed so you can keep adding on skills like teaching Pilates, strength training etc, or of course you can do them privately as well. Or once you're qualified as a PT you can set up self employed and work around a day job and have clients in evenings and weekends, I know trainers that do that.
The part of it that took me the longest was finding somewhere that ran the courses and didn't charge an arm and a leg. I paid about £900 in total for all three qualifications but it can be more.
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