Fitness hashtagas

My IG account is doing OK. I post on daily basis, I get new followers on a daily basis, 20% or more of my followers see my posts, I repost on my FB accounts, the visual quality of the posts is satisfactory, I try to be personable and always have a call to action.

I am always using all the 30 hashtags that are allowed but not sure if I am using the correct ones.
My ideal market/follower/client is male over 30 professional.

How do I define the best hashtags?
Is there a good # generator?

Are the followers you're gaining daily within your target audience of professional male, 30+? If not then I'd suggest changing some hashtags.

From my experience, manually searching from my phone on the app has given me the best results since I can check the audience of the hashtag right there in real time. Searching from my phone also allows me to see which hashtags have been hidden by Instagram, for example: #snapchat

I agree with frogger. If your target audience matches your actual reached audience you should be good. If not, you may wanna switch some things up. Most # generators just pick your word and add another word or two as a popular hashtag. Finding your tags manually takes time, but does give better results.

I will suggest you to make an excel sheet and record all the tags you use and their audience reach. Keep a track of your posts likes + followers with the relevant tags. Play with the tags and find the best tags that give you the audience reach.
This way you can keep a track of your tags, it is beneficial in the long run.

Thanks for your time.
I suspected that the manual route would be the one...