The study recommends that patients get a daily amount of 1.4 to 1.5 grams of protein per kilogram of body weight to help renew and repair the bone marrow. Iron and Bone Marrow Function A key function of bone marrow is to produce red blood cells -- the iron-containing cells that carry oxygen to every part of your body.
A cross-country mountain biker on a trail in Utah. Cross-country (XC) cycling is the most common discipline of mountain biking.Cross-country cycling became an Olympic sport in 1996 and is the only form of mountain biking practiced at the Olympics.ross-country bicycles are some of the lightest mountain bikes, typically between 7 and 16 kilograms (15 and 35 lb).
1 An evolution from the Jet line, Niner's RKT9 is a dedicated XC racer that balances quick steering and short travel suspension. 2  First Ride: Santa Cruz Bronson and 5010. 3  Although the line between trail and enduro bikes is often blurred, Santa Cruz's updated rides provide two different experiences. Ride the massive 30-kilometer ascent of the Col d'Izoard, which has featured in both the Tour de France and Giro d'Italia. 2  Video: Top-10 weirdest mountain bikes ever. 3  Global Mountain Bike Network digs up 10 of the weirdest, ugliest mountain bike frame designs every seen on dirt.