I would say that I probably have more experience in the field of health and fitness and medical research than anyone on freelancer.com. Over the past 12 years I've been a professional athlete in 2 major sports, a professional strength coach on the collegiate, professional as well as elite high school level. I'm a college educated nutritionist and have had clients ranging from professional athletes, elderly, those with nutritional limitations and serious, adverse health problems. I have extensive knowledge of human kinetics which leads very well into injury prevention, rehabilitation and performance enhancement. Being a vegetarian as well as having a connective tissue disorder, I've taken a very serious commitment to clean health and well being through what most would consider alternative means (yoga, meditation, Pilates, herbal treatments). With my experience, views and lifestyle I would bring a lot to the content provided.
I would write superb content for your website, i have no doubt that you would be very pleased.