white adidas trainers mens Lighter Running Shoes Really Can Make You Faster
If you’re gunning for a new 5K PR, you may want to check the scale for the weight of your shoes, that is. A new study shows that people run slower when wearing heavier sneakers, even if the difference is just a few ounces.
It’s long been known that wearing heavier shoes makes runners work harder,and experts have theorized that that would slow them down. (One oft cited estimate is that for every ounce a runner shaves off her sneakers, she’ll run onesecond faster per mile.) But researchers at the University of Colorado Boulder wanted to find out for sure if this was true.]]
The researchers recruited 18 competitive runners to complete 3,000 meter time trials (about two miles) on an indoor track, once a week for three weeks. Unbeknownst to the runners, small lead pellets were sewn into two of the three pairs of racing flats theywore.
the shoes weighed 7 to 8 ounces each, depending on size. The pellets added about 3.5 ounces (or the weight of a deck of cards) per shoe for one pair, and about 10.6 ounces per shoe for the second pair.
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To help prevent the runners from detectingextra weight, the researchers put their shoes on for them. Still, the runners noticed the difference:In their time trials, theypaced themselves differently and for every 3.5 ouncesof lead added per shoe. The researchers calculated that elite runners wearing shoes 3.5 ounces lighter than normal could potentially run a marathon about 57 seconds faster.
The study also measured how much energy the runners expended by testing theiroxygen consumption and carbon dioxide productionas they ran on a treadmill wearing each pair of shoes. The results compared well with previous studies and matched the results of the indoor track time trial showing that energy costs rose by about 1%with each 3.5 ounces of extra shoe weight.
Don’t go out and buy a new pair of running shoes just yet, though. He recommends that shoppers keep this trade off in mind when choosing a running shoe that feels good lightweight still but adequately cushioned on their feet.
The study was funded by Nike and published in the journalMedicine Science in Sports Exercise.
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