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From the Archives: Maximal Speed and Deceleration

You are here: Home / Coaching / From the Archives: Maximal Speed and Deceleration
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March 17, 2010 by Jimson Lee Leave a Comment

43 years ago today…

John Smith of HSI once said the goal of a 100 meter performance is to ELIMINATE the Negative Acceleration Phase.   Another term is deceleration.  Everyone decelerates in a 100m. 

Even Usain Bolt decelerates, as seen in his splits, though he reaches his top speed well past 60 meters. 

When Carl Lewis decelerates, it appears he is speeding up as others are decelerating at a rate greater then him.

The topic of maximal speed and deceleration have been around for decades.

Here is an old clipping from TIME Magazine, March 17, 1967.

Just for a comparison, Tommie Smith’s maximum stride length was 2.71m (8ft 11in) compared to Usain Bolt’s 2.95m. Tommie is 6 feet 3.5 inches tall, slightly under Usain Bolt’s frame at 6 ft 5 in.

A lanky (6 ft. 3½ in., 167 Ibs.) Negro who wears sun glasses "for personality" and is so relaxed that he often catnaps for ten or 15 minutes before a race. Smith is called "Jet Gear" by rival sprinters—because of his huge stride (8 ft. 11 in.) and incredible acceleration. "Other sprinters reach their top speed at 75 yds, and then decelerate," says his coach, Lloyd ("Bud") Winter. "Tommie is still accelerating at the end of 100 or 220 yds. He can sustain a speed of 26 m.p.h."

For a relative look on how fast 26 mph is, or 42 kph, see https://speedendurance.com/2009/08/30/usain-bolt-tyson-gay-broke-the-44-kph-speed-limit/

When will we see 30 mph?

See also  400 Meter Training Workouts – the Descending 6×200 meters

Category iconCoaching,  Olympic History,  Track & Field Tag iconBud Winter,  maximum velocity,  Tommie Smith

About Jimson Lee

I am a Masters Athlete and Coach currently based in London UK. My other projects include the Bud Winter Foundation, writer for the IAAF New Studies in Athletics Journal (NSA) and a member of the Track & Field Writers of America.

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