The following electronic only articles are published in conjunction with this issue of BJSM

Live high-train low associated with increased haemoglobin mass as preparation for the 2003 World Championships in two native European world class runners

J P Wehrlin, B Marti

Background: It is unclear whether world class endurance athletes, in contrast with less well trained subjects, increase their haemoglobin mass on a regimen of living high and training low (LHTL).

Objective: To assess whether haemoglobin mass increases in world class athletes on LHTL and whether this increase is associated with peak performance at a subsequent important competition.

Methods: Two Swiss world class runners (one 5000 m and one marathon) lived for 26 days (18 hours a day) at an altitude of …