I would not use high class keywords in my text but would use them in an extra page.
I believe it is okay to weave this into your text (lose weight by running 1073/93)
as an additional keyword BUT you have to put keywords like this into the title
and description and keyword box as well.
But in this case you can't do this as it has the same meaning like the main keyword, it would sound strange.

But I would not use this >running for weight loss 3403/317< in the same page
but would build another t2 or t3 if possible.
Keep in mind that keywords can step on each others feet!
So don't hit five top keywords into one page. This is nonsense, if you think about it logically.
Which pages will google list then if many pages are clustered with the same keywords?

This effect will also happen if you have a lot of pages, let's say 600 pages. And many use same keywords in the text.

There is a thread in the SBI Forum.

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