This website is directed by Lyle McDonald, very well known in the fitness community. He wrote books such as The Rapid Fat Loss Diet, Bromocriptine and a slew of other really good scientific reads.
I went through a phase where I was all about keeping track of my body fat percentage. DEXA might be the gold standard in body fat testing, but the whole market of body fat testing is still too error-prone to be taken seriously (subject for another post). In any case, this is where I went to schedule my body fat tests;
This website is great for tracking calories. They have a H U G E database of food. I would just highly recommend avoiding the forums on here. They’ve also made an app which I have had on my phone for years. I literally use this app every day to track my calories, macros, weight, etc.
Another fitness genius who analyzes scientific topics on fitness for the lay-person.
Where I got my workout routine specifically tailored to my lifestyle and gym. The owner of this website, James Krieger is highly respected by the likes of other fitness minds, like Lyle McDonald.