From the early training days of Arthur Lydiard, runners have used miles to log their volume of workouts for a week. How many miles per week you ran were like badges of honor worn on your chest.
Some cyclists look at the distance of the Tour de France, over 2,000 miles in three weeks of racing, and compare their training to these distances – while others boast of century rides.
Now there is a new shift in the thinking of training, especially in terms of volume. Though distance was the standard way of measuring volume in the past, many eventually began to wonder if there was a better way to accurately assess the stress on the body.
More can be read here at Competitor Magazine.