Hey there!
I think I can help you out. Fitness is a passion of mine and I believe I can contribute to you blog. I, myself, am currently studying to be a personal trainer and have been working out for over 4 years now (I'm 18 years of age). I am interested in everything fitness-related and I can write about anything. To help you out even more, I have connections to fitness models such as Gints Valdmanis, whose experience and knowledge could help out a ton. I am currently cutting for a Men's physique competition in July, so this would be a great way to get my mind off of chicken and broccoli. :)
I hope to hear from you soon, best of luck!
Karlis