Critique this book cover

[WildRice]

Hello all,
I have been fortunate to get a double book contract with the largest science book publisher in the world (Elsevier/Academic Press) and got to work with my all-time sports hero Greg LeMond, which was a dream come true. The first book is already out and successful, "The Science of Fitness: Power, Performance, and Endurance" which is an affordable paperback for athletes, trainers, and students. I had major input on that cover design and self-illustrated the inside of that book. Now we are working with the publisher to come up with a design for the second book which will be a more expensive textbook for scientists, clinicians, and researchers titled "Mitochondrial Fitness: The Science of Athletic Energy". I drew the background which consists of mitochondria (they make your cell energy) and we can use the photo of Greg being VO2 max tested back in the early 1990's (his VO2 max was one of the highest ever recorded). I like this photo since the athletic testing shows the merging of science and sports. I put it together using Xara PGD9. What do you think about the color, format, proportions, fonts, photo, etc and with Xara I can change any of it. I need to hear from you soon since publishing decisions need to be made. The first book cover "SciFit" is a done deal for now although we could change it for a second edition (we avoided the mitochondrial name and blob image on this fitness book, the rainbow stripes represent LeMond's world championship wins). I mainly need input on the second book, "MitoFit", the blank area at the bottom is reserved for logos of the publisher and an endorser (UMDF.org).



I was recently on local TV about the first book:
http://wtvr.com/2015/02/05/dr-mark-h...nce-endurance/

Thanks for your help.