improvements, often four to six per cent. No surprise there. Interval training has been a favourite of top coaches and runners since the end of World War II. This type of training involves fast intervals of two minutes to 10 minutes at about your two-mile race
: The Basics Get started with this snappy, foolproof guide complete with heart rate training zones and sessions.Our Complete Guide to Heart Rate Training (non-subs preview)Learn to train with your heart rate, and it won't just be your pulse that races faster
