However, it's still an extra cost, and enchanting items directly has a chance to get multiple enchantments. The big advantage of books is that they can be stockpiled for use on an item of choice, and allow for controlled combinations.
If you're more focused and using decent form, a 15 minute mile (3 minutes for 300 meters) is the where one study found was the most EFFICIENT speed (as far as calories per mile or per kilometer). I try to coach run/walkers to maintain that speed during walk breaks. If you go beyond normal, Race walkers can go as fast as 6 minute miles or around a minute or less for 300 meters. Views Â· View Upvotes Â· Answer requested by 1 person.
There is a range in between walking speed 4-5kmh/h and 100m record sprinting 37.58km/h (Usain Bolt 2009). Generally for longer distances average speeds are half those of professionals, so for a marathon 2 hours becomes 4 hours or 10.5km/h.