The normal concentration of sodium in the blood plasma is 136-145 mM. Hyponatremia occurs when sodium falls below 130 mM. Plasma sodium levels of 125 mM or less are dangerous and can result in seizures and coma. Did I scare you? Good. Read on.

One of the key skills in road riding is the ability to ride in a pace line. By working together and sharing the work, a group of riders can go much faster with less effort than a single rider. The additional speed often leads to friendly competition. While the fun factor increases, too often safety is compromised. To help you avoid meeting the pavement by accident, please keep these safety factors in mind.

As a triathlete, have you asked yourself why some cyclists are hesitant when you show up with aero-bars? Do you see a concerned look on their face? If you think they are intimidated because of your blinding speed and strength, think again. Is it your super cool bike? I'm sure they appreciate the machinery but that’s not it either. You’re skin tight apparel? Sorry! None of these are what concerns roadies when you show up for a group ride with aero-bars. What is it?.....It’s their safety.

Running is not easy. However, for the time invested, it is by far one of the most beneficial activities in terms of workout, calories burned, muscle strengthening, stress relieving, and overall fitness improving activities you can do without placing a strain on your career, family, or relationship. Below are a few basic running principles that foster an efficient running posture and possibly help you make some improvements.

Dehydration

Dehydration is not limited only to the summer months, although it's probably more likely to occur during that time. Many physicians believe that most people are in a constant state of dehydration. Since coffee, tea, soda and alcohol act as a diuretic, anyone who drinks these fluids on a daily basis, and doesn't drink at least an equal amount of water, will probably be dehydrated. If the person is physically active, the potential for dehydration is even greater. Working out in hot, humid conditions promotes sweating, which in turn can cause dehydration. Sweating is good for you because it cools your body, but when you lose too much water you become dehydrated. If you're already slightly dehydrated, sweating will only make it worse. It's important to maintain an adequate fluid intake all the time. Don't expect that you can make up for several days of not drinking enough by downing two cups of sports drink before your next long run or race. It's important to keep hydrated all the time. Once you start to feel thirsty, it's too late.

When you run, your body looses fluids. To run optimally, you need to replace the fluids your body looses. Your personal sweat rate (PSW) will help you determine how much you need to drink and how often while you are running. How to determine your sweat rate: