UPDATE3: I think I should re-emphasize that I want something relatively simple and clean. The idea of incorporating the meal planning aspect is great, but I would rather have something clean, modern, and simple than something with a lot of stuff going on.
UPDATE2: Designers seem to be gravitating towards logos that incorporate an apple to meet the dual meal plan/workout impression I mentioned below. Some of those designs are good, but I don't think apples really convey what I'm going for. They're not really the type of food people think of when it comes to training or getting fit and there's also a lot of inherent association with Apple the company.
UPDATE: I'm getting a lot of logos with kettlebells as the core concept, many of which are good, but I already have a bunch with that basic idea, so it'd probably be good for future submitters to go a different direction just so I have a broader array of options to look at.
The primary use of this logo will be as part of a website header, but I'm looking for something that could double as an app tile/icon on a phone/in an app store.
I want something with a modern feel that conveys strength/speed but that's also non-threatening (not too masculine) and maybe even slightly playful, if that makes any sense.
This is also probably pie in the sky, but I would love it if the logo somehow conveyed the dual aspects of the app, i.e. the training/workout aspect and the meal planning/nutrition aspect, but only if this can be done without taking away from the modern feel.
Lastly, it should look good on a relatively dark background, since the app header is currently a dark grey.