What kind of content are you adding to the website? After you continue to add content, after a while, the ads slowly get better and more on target to what your content is about. If you're targeting your audience correctly, they will also likely be more likely to click on your ads.
Keep working. More traffic = more clicks, every day of the week.

Adsense maybe just isn't a good fit, although it's a bit odd that your fitness site isn't getting more targetted ads. I am not in the US/UK etc. so I am probably seeing even lower quality ads, but still, none of them have ANYTHING to do with building muscles and whatnot.

I have no idea why that is, but what about trying some Clickbank products instead?

As for your "disease" page, that's odd, there are more targetted ads showing, I would have expected a better CTR. I wonder if most of your visitors are not actually looking for relief from the condition in question but just information, i.e. research traffic...

Sometimes Adsense is weird like that, I have sites built very similarly in similar niches, one gets good CTR, one has almost non-existent CTR.

One suggestion is to try and build more "problem-solving" content on subpages and try to get some more long-tail "solution-seeking" traffic off the back of your main content.

Sometimes you just have to keep tweaking...

Where is your traffic coming from? 0.2% is very low in my opinion. Your content and positioning seems to be okay.

I don't imagine your ctr will ever improve for the Osgood site. If you were a visitor, what kind of ads would you expect? Maybe a treatment or clinic for that disease specifically would attract a click, but I doubt there are any ads for that. At least, I didn't see any.

There are likely many relevant/interesting ad titles for the biceps site.
Nonetheless, when I visited your sites the only ads I saw were about web design.
You could try turning off interest based ads in your Adsense settings, which shows visitors ads based on their web history.
Go into adsense allow/block ads and you'll see it there.

Are you using AWStats? This might be the problem.

I wonder if any of this has to do with the recent updates google made...

if u have good voulme of traffic and poor convertions with adsense, it's time to try another menotiozations methods. try to build a list. try to sell ad space. try to sell leads...

another thinking would be to add content that is more adsense friendly. meaning - writing about a topic and not covering everything. this way, the user need to click on a link or add to get more info. put the adsense block in a good place and u will get more links.

good luck

I agree with the previous post, and here is a great tool that allows you, in WP, to put the Ad-sense ads where you want them to be in your post.
WordPress › Instant Adsense « WordPress Plugins

CTR is very low. You should try to check your ads in page if this actually relevant for your content or not.

Lets face it people are becoming ad blind. It's now happening.