hey there thanks for replying. I'll definitely check the sites recommended. I totally agree with you the fitness/weight loss is definitely saturated that's why I'm taking my angle and aiming at spanish speakers. The translating idea is awesometastic, its crossed my mind before but now its dropped the duffel bag and pitching a tent. Just not sure how I would market that on the site asides from networking. Any ideas? I was wondering which you would recommend working on first content or setting up adsense, clickbank and all that good stuff? this is where I'm stuck as of right now.

Work on your content first, and build affiliate relationships as you go. You can go back and edit your posts to work in commissionable products/programs later. Also, certain affiliate programs will not approve sites that are "under construction". That doesn't mean you have to have tons of content before you apply to affiliate programs, just that it shouldn't be "bare bones" either. With Google AdSense, you don't have to have too much content - just enough so that relevant ads can be delivered. The top four affiliate networks that I use are Commission Junction, Google Affiliate Network, ShareASale, and Amazon Associates. With those four, I have access to many different merchants and many different products that are related to my niche.
Because your niche is not just product-based, but information-based (diet and exercise programs/systems), you will have a wide variety of affiliate relationships you can develop. Besides the four I mentioned above, you can use ClickBank, etc. to offer informational products. It's been ages since I've applied to ClickBank, so I don't know if the rules have changed, but they didn't used to have any content/traffic requirements. You could apply at any time, even if you didn't have your own website. Many individual fitness systems have their own affiliate programs, some of which you sign up for individually and some which can be accessed through affiliate networks. For example, I'm sure you've heard of P90X. It does have an affiliate program, and there is a Spanish version. I'm not endorsing that particular system, I'm just throwing it out there as an example. I know that Team Beachbody has an entire fitness site, with all sorts of products and programs, tips, guides, a forum, etc. They have an affiliate program AND the entire site is also in Spanish. If you visit the site, you will see a button in the upper right hand corner to switch to Spanish. If you were an affiliate, you would obviously link your traffic directly to the Spanish version of the site. Again, I'm not endorsing this, just putting it out there as an example. I hate to have to keep saying that, but folks are REALLY touchy about promotion here, so I feel the need to reiterate that these are NOT my sites and I'm not promoting them, I'm just trying to give you examples and ideas to get your own wheels turning.
With all that said, I have a feeling that you will have no trouble at all writing great content. Your only challenge will be finding relevant products that are supported in Spanish. For example, let's say you write a post about using fitness balls. Within your post, you link to a good quality, reasonably-priced fitness ball on Amazon (or the whole category of fitness balls - you can link to pretty much whatever you want there). It's Amazon, and as you know, they have pretty much everything under the sun. So your visitor buys one of those fitness balls, but they also pick up some bulk diapers for the baby, their husband needs a new electric razor, a gift for their mother... you get the idea. You make commission off anything they buy, not just the specific product you linked to. Sounds great, buuuut.... I have looked and looked and haven't been able to figure out if Amazon is available in Spanish. They have a books section in Spanish, and Amazon-Spain is of course in Spanish, but I cannot tell if the whole regular Amazon site can be accessed in Spanish. So you will run into obstacles like that. But, being bilingual, you may be able to help your visitors navigate non-Spanish sites.
Okay, I better get to work on my own site ;). I've got posts that I've been putting off writing. You may not believe this, but I HATE writing. I do. It's the truth. I don't mind writing in this context, to help someone who has asked specific questions. But I find it difficult to write from the hip on a given topic. It's like I NEED someone to ask a question. Perhaps I should've started a Q and A site ;) Hindsight, ya know?
Oh, I almost forgot about the translation services. If I were you, I would have a separate site for that. You could have a small snippet on your fitness site linking to your translation site, of course. But I would market it entirely separately.
Perhaps someone else will come along (nudge, nudge, hint, hint) and be able to offer you more guided help. In the meantime, dig into all the great training, guides, tutorials, etc. here. They're refreshingly well-organized compared to my scatterbrained "help" ;)