Siloing and structuring my website

Hi,

http://www.thebestgymworkouts.com

I’ve had information given to me and also read articles about Siloing and the basics by Bruce Clay and another article i found and i understand the basic concept and how it can help my site. I’m still confused as to HOW to implement it to my site specifically. I’m using pages and i have three main categories (arey they called parent pages or..?) Workouts for Men, Workouts for Women, Workouts for Beginners.

Now, i’ve downloaded a plugin that enables me to set pages as categories so should i assign the above pages as categories and then put my relevant pages inside those categories?

Or shall i assign my pages to these parent pages above? Or what else can i do to improve my structure and help with SEO?
I’m a bit confused…

Thank you