I want the title FITNESS HACKING to be in caps, bold, and in a big font size. Also positioned at the top of the cover. The subtitle can be considerably smaller, and my name even smaller again please.
I want the title to be bold, striking, and one that's very noticeable when people see the thumbnails on Amazon.
Colours - I selected blue simply because it's my favourite colour, along with red and neutral. But I'm happy for you guys to experiment a little.
I'm not sure about images. Something that represents weight training would be a good idea, but definitely not an off-putting bodybuilder type image.
You can view my other fitness book covers here: amazon.com/author/marcmclean
....but of course, your design will be much better than those ;-)