Your colors choices are great and the simplicity of only two will make things easy for me.
A blue would be good for its neutrality, association with trust, reliability and belonging but most fitness clothes are black and it is very important that this logo matches clothes.
Nonetheless, a blue base will be good for the website and a black base for a t-shirt.
The "E" in your design is difficult to distinguish from a "C" and the slash looks as if it is going through the letters whereas an attempt to make the letter look as if they are going forward would be stronger.
The new E now the identity that it lacked before but putting it next to your previous design, it seems to be moving but slower. The design needs to show fast paced which I like in your first design.
Also, the serif font on the bottom is good. Can you put some variation on that? Also see if you can line the direction of the characters up with the direction of the characters of the large "EA."
Even though I have them ranked 5 and 6, your designs #1 and #2 are very much along the lines of what I am looking for. Take a look at #7 and consider a softer revision which will be very nice.
What is the best way to discard designs that I do not want? For instance with your #4 design, I did not like as much as the similar design of #2. Is it better to leave it unranked, ranked low, or not interested? Thank you.