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More on Drive Phase and Acceleration

You are here: Home / Coaching / More on Drive Phase and Acceleration
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April 5, 2010 by Jimson Lee 2 Comments

Last Updated on April 26, 2014 by Amir Rehman

Maybe I should rename this post, “oversimplifying simplicity”?

Remember taking golf lessons when the 3 golden rules for hitting a tee shot were (1) don’t move your head (2) keep your left elbow straight and (3) keep your eye on the ball?

The overall concepts are correct, but it’s NOT the best way to teach hitting the clubface to produce a straight shot.

Novice Track and Field coaches, especially for Youth athletes, will tell kids 3 golden rules to how to come out of the blocks for a 60m or 100m sprint.

They are (1) react to the gun, not listen to the gun, and flick your left hand and arm out in front of you explosively – assuming the right leg is rear leg (2) stay low coming out of the blocks (3) take quick choppy strides to get out faster.

:o(   <- NOTE: this is not a happy face

I cringe when I hear that advice.  Not that it’s wrong, or right for that matter, but that’s not the point of the short sprints events.

True, kids have a limited capacity to remember details, and the fewer the cues, the better.

It’s just that these coaches don’t see the big picture. If you look at the Tom Tellez breakdown of a 100m sprint, acceleration is the biggest component.  So one should focus on drive phase and acceleration.

Percent Contribution to a 100 meter race

Drive Phase and Acceleration

I define acceleration as driving your center of mass in the direction of travel, which is a linear horizontal line.  You have 2 forces from ground contact once you leave the blocks: horizontal and vertical.  You get the most power from horizontal.  Ask anyone from the East Coast when you help push a car out of the snow.  Are you upright or low to the ground?

See also  Armin Hary and the Famous 10.0 sec 100m World Record

But if you pop up out of the blocks (or use Moye Blocks) you don’t get the power anymore.   You are actually in a better position to take short choppy steps.  But if you an older Master’s sprinter, a youth athlete, or even Bill Collins, a standing start or using Moye blocks may work better for you anyways.  (note: ALWAYS BE AWARE OF YOUR STRENGTHS AND WEAKNESSES)

Leaving the blocks should be at 45 degrees with full extension to maximize your full power.   Please don’t teach kids to “stay low”.  That’s not the point.  Carl Lewis, a tall athlete who isn’t considered a great starter, has perfect form coming out of the blocks in a 200 meters as seen in the photo (circa 1988).

[Tweet “More on Drive Phase and Acceleration”]

Carl_Lewis_BlocksStride length is important too, but not at the expense of a braking action. (see my previous article on the trend towards longer strides)  Sprinting faster times is about greater force you apply to the ground down and away, as your body moves forward in the other direction.  Concurrently, your hips will drive the other leg forward, and this combination will give you the maximal stride length you require.  You don’t want to do “bounding” either as you want a smooth momentum in the direction of travel.

Frans Bosch has coined the term “whip from the hip” and I can’t say it better than that.  I won’t get into details about dorsiflexion and triple extension in this article.

Drive phase and acceleration isn’t limited to sprinting in Track and Field.  Take a look at the first 20 yards of a 40 yard dash, or a baseball player stealing 90 feet.  (actually, it less than 90 feet with the lead, and there’s a pivot involved, too)

See also  Sprinting: 10 Research Articles for Effective Sprint Training [Part 11]

Training Drive Phase and Acceleration

So how do we train drive phase and acceleration?

The best way is get on the track, of course.  Technique must be carefully adjusted, especially when trying to break bad habits.  We all know those bad habits creep back when fatigued or when you get stressed and nervous at big meets.

But if you break it down, it comes down to 3 points covered in detail in older posts:  Power, Speed and Strength

For Power, you can do uphill running, or use sleds, isorobic ropes and resistance bands.

For Speed, there’s pure speed work of course, plus the use of acceleration ladders and speed ladders.  Phil Campbell’s 40 yard dash DVD (read my review  here) has a lot of good drills with ladders at the end of the video.

For Strength, Jim Hiserman discussed Greater Strength = Faster Times in great detail on a 3 part series. (start with Part 1 here)

CONCLUSION: ALWAYS run within your means, and don’t sacrifice bad technique to compensate for power and speed, or from a lack of strength for that matter.

Category iconCoaching,  Featured Story,  Track & Field Tag iconAcceleration,  Drive Phase

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.

Reader Interactions

Comments

  1. jim Hiserman says

    April 6, 2010 at 4:52 pm

    Great article and very good points of emphasis. Falling at the hip w/partner catches and then catch and release is a very good way to get athletes to experience the acceleration body position they need for proper acceleration to take place.

    Reply
  2. Kohran Johnson says

    April 14, 2013 at 8:07 pm

    After reading this article, I understand what you mean but I am a little confused.

    I coach all ages from 1st grade (6 years old) to Varsity HS (age 18). I teach them ALL about drive phase. For the High School kids, I teach them to drive and keep their body lean forward and I say “stay low”, but I explain to them I don’t mean bent over, just driving forward and how it projects their body forward. I can talk to them about the 45 degree angle.

    My question is, how do you explain that to a 1st grader. They are not familiar with angles, let alone much else. Teaching them to stay low seems like the simplest way to teach this to me. What I teach more specifically is ‘you want your body facing forward, not up. Get your arms and legs moving as fast as possible before you pick your head up’ (that’s generally what I say, but not exact). To me it seems the most logical way to make it simple for the kids. I also put cones on the grounds so they can focus on looking forward ahead and down, which tends to keep their body slightly facing forward.

    If you have any suggestions, please let me know.

    Thanks,

    Coach Kohran Johnson

    Reply

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