I would like the design to include the references to strength, mind, power and heart.
Something with weights like a dumbbell or barbell, a heart to refer to cardio vascular training. Or some movement in it; something dynamic.
If possible, I would like the logo without text and with text (Dymphy Fit).

My colors are black and peach. See my website for the colors and more information about me: www.dymphyfit.com or my Instagram @dymphyfit.

Edit: I don't like my initials D.F. in the logo.
Functional requirement: I need to use the logo on white paper and black clothes. So the logo needs to be invertible: black logo on white background and white logo on black background. 

Cintoko provided a lot of different designs and replied quickly with new edits after my feedback. Cintoko also sent me the winning logo in many different backgrounds and file types. Full service! I love the end result and I can really recommend Cintoko as your designer!