and on the run. As long as you expect this, you shouldn't have a problem. Armed with your heart rate monitor and a little know-how, you'll be able to avoid overstressing your body in the heat or at altitude. It will help you stay within your limits, and you

, rather than extra red cells. Some scientists believe training at moderate altitudes (2,000-2,300m) may be detrimental to general health, raising levels of damaging free radicals, and depressing the immune system, but these are not because of raised levels

rate monitor to get back to speed after illness and injury. Training In Heat Or At Altitude Avoid overstressing your body in the heat or at altitude by using your heart rate monitor to help you stay within your training limits. How To Use A Heart

training plans. For the last three decades, exercise physiologist Jack Daniels has set the standard for designing such plans. Along the way he’s worked with dozens of elite athletes, ranging from Ryun (Daniels helped him prepare for the high altitude

? How hard should speedwork be? How can I conquer hill running? What are the effects of altitude training? -->Am I ready to phase out my walk breaks? How can I calculate my maximum heart rate? -->How should I carry water bottles? Why cool down