are characterised by non-rapid eye movement, while stage five is marked by rapid-eye movement (REM). Depending on age and how rested the individual is, REM and non-REM patterns cycle throughout the night about every 90 minutes. When brain waves are measured

day and train too hard. Now you’re a bit tired for your next session – which doesn’t go as well as planned. Annoyed, you run the next scheduled easy day a bit harder. "So begins a vicious cycle in which the easy days are done too hard and the quality

are characterised by non-rapid eye movement, while stage five is marked by rapid-eye movement (REM). Depending on age and how rested the individual is, REM and non-REM patterns cycle throughout the night about every 90 minutes. When brain waves are measured

baths, compression and massage combined with 20 to 30 minutes' light cycling or swimming in the days after your marathon." The Wall Explained..."Hitting the wall is about running out of energy," says Dr Tom Crisp, sports and orthopaedic physician

day and train too hard. Now you’re a bit tired for your next session – which doesn’t go as well as planned. Annoyed, you run the next scheduled easy day a bit harder. "So begins a vicious cycle in which the easy days are done too hard and the quality

Ewen, City of Edinburgh AC (edinburghac.org.uk) Cross-train If you want to avoid injury, complement your running with other activities such as swimming, resistance work in the gym and cycling – if nothing else, it stops you going insane and gives