The word interval means repetition in respect to track athletics. Interval training, then, means repetition training, in which specific distances are run over and over again. An interval usually is run at a brisk pace. In order to recover before starting the next interval, a short or long recovery phase is requires. Recovery may be in the form of a slow jog, a walk, or a rest, or a combination of all these. Favorite distances range from 110 yards to one mile, but 440 yards tends to dominate
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Book Description Runner's World Magazine, 1972. Book Condition: Good. 1st. Shows some signs of wear, and may have some markings on the inside. Bookseller Inventory # GRP97439802
Book Description Runner's World Magazine, 1972. Paperback. Book Condition: Good. We have 1.5 million books to choose from -- Ship within 48 hours -- Satisfaction Guaranteed!. Bookseller Inventory # mon0000592916