May 1991: How to make your intervals more “realistic”; VO2max explained; Self-monitoring – an athlete’s checklist; A further look at sodium bicarbonate; The effects of eccentric exercise; Does sleep loss affect performance?; Athletes are at risk from upper-respiratory tract infection; Maintaining blood sugar levels; Does warming up enhance performance? Excessive exercise: the warning signs; How to avoid “jock itch”; Why inactivity doubles heart disease risk; New warnings on EPO blood doping; How training threatens immunity