Speed & Agility – RFD, Impulse, and Stride Characteristics | CSCS Chapter 19

Learn how rate of force development (RFD) and impulse affect stride length, as well as the relationship between stride length and frequency in sprinting. In this video we'll also look at the differences between agility and change of direction, as well as the neurophysiological basis for speed. Info comes from the NSCA's Essentials of Strength Training and Conditioning, chapter 19.

RESOURCES MENTIONED
Haff, G. G., & Triplett, N. T. (2015). Essentials of strength training and conditioning 4th edition. Human kinetics.

Disclaimer: This video does not have any affiliation with, or any recognition, sponsorship, or endorsement by, the NSCA. CSCS® and Certified Strength and Conditioning Specialist® are registered trademarks of the National Strength and Conditioning Association.

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Have a great day and remember to move well, live well, and teach others to do the same!

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Dr. Jacob Goodin is a professor of kinesiology at Point Loma Nazarene University (PLNU), and holds a PhD in Sport Physiology and Performance from East Tennessee State University. He has over a decade of experience as a strength and conditioning coach and sport scientist from the high school to NCAA Division I levels. In addition to his role as a professor and research mentor, Dr. Goodin directs the Athlete Monitoring Initiative at PLNU, which provides testing and monitoring services to over 200 athletes yearly as well as research opportunities for kinesiology students.

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[clairemasterson]

I like how you pointed out that a person can over stride in certain situations while running. "Lengthen your stride!" was a very common thing yelled on tracks when I was in h.s.

[Moniiiqueee]

Super interesting breakdown on speed and agility! Never knew how much RFD plays a role in how quickly an athlete can accelerate and change direction

[IvyBartlett]

I found this video particularly fascinating as it introduced new scientific models related to sprinting that I wasn't familiar with before. For instance, it covered the spring-mass model and how an individual’s muscle configuration can influence their spring mechanics during sprints, ultimately impacting their overall speed.

[NoelleDarquea]

Enjoyed learning about the differences between stride length and stride frequency and how they tie in together

[ameliabrock]

I really enjoyed how clear each section of how speed and agility can be measured and broken down. It is important to note the differences and biomechanical focuses and needs between a track sprinter and a soccer player in terms of support and directions of force.

[ClaireStone-jqwg]

Comparing the stretch-shorting cycle to a spring made it a lot easier to comprehend!

[sal]

The best refresher video I’ve seen since I was certified 12 years ago as an nsca cpt. Thank you Dr Goodin! Great video. Got me pumped!

[thomaskinzler]

I found it extremely interesting how stride length and frequency interact to be a function of velocity. I figured that stride length would plateau at some point because realistically a person's legs are only a certain length, but had never thought about how the frequency of strides increases to increase velocity. I figured it was just a result of power output, so to understand how stride frequency is at play is very helpful.

[jupshaw]

Love learning about how the SSC is so important in sport, looking past how much and athlete can squat or bench has certainly helped me create a better understanding of athletic performance.

[caleighgarcia]

I like how we used concepts from the previous chapter about the SCC and applied it to the topics talked about within this chapter. It helped me get another perspective on the SCC and how important this concept is.

[mollytucker]

I think its cool learning about stuff we've learned about in other classes in this class...in this video it was biomechanics. It is cool to be able to connect what you learn in different classes to each other.

[julianasum]

This video helped me understand that stride length as well as stride frequency are important in terms of speed.

[celinegriffin]

I like how you pointed out that emphasizing these exercises can increase the neural drive while overloading the musculature of the hip and knee regions that are involved in the SCC.

[audreyoates]

The analogy of the muscles acting like a spring coiling and uncoiling is helpful!

[karatemplin]

Every time the SSC is mentioned I’m always amazed

[charmenatchison]

it's nice to have a breakdown of measuring speed abilities because it empowers you with how to improve it.

[MatthewDuPrey]

I really enjoyed your explanation of the neurophysiological section because after reading the section there was some parts that I was confused on that this helped me to understand.

[emilywalker]

The spring mass model was such a helpful analogy! Also stride length and stride frequency was so fascinating.. and definetly got me thinking on runner height!

[jadenrea]

This video was super helpful after reading through the material in the textbook. The book definitely covers a lot of material so it was nice to hear your explanations of topics, charts, and graphs discussed in the book.

[tianguyen]

As much as I hated my Physics courses, I know now why it is so important in Kinesiology. I'm glad that some of the things I learned can be applied to these topics of speed and agility.