Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Variation: Normal Distribution, Range, and Standard Deviation02:32

Variation: Normal Distribution, Range, and Standard Deviation

29.8K
In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
29.8K
Range Rule of Thumb to Interpret Standard Deviation01:13

Range Rule of Thumb to Interpret Standard Deviation

13.9K
The range rule of thumb in statistics helps us calculate a dataset's minimum and maximum values with known standard deviation. This rule is based on the concept that 95% of all values in a dataset lie within two standard deviations from the mean.
For instance, the range rule of thumb can be used to find the tallest and the shortest student in a class, given the mean student height and standard deviation. If the mean student height is 1.6 m and the standard deviation, s is 0.05 m, the height...
13.9K
Applications of Normal Distribution01:22

Applications of Normal Distribution

9.8K
The normal distribution is a useful statistical tool. One of its practical applications is determining the door height after considering the normal distribution of heights of persons, such that many can pass through it easily without striking their heads. The normal distribution can also determine the probability of a person having a height less than a specific height.
The heights of 15 to 18-year-old males from Chile from 1984 to 1985 followed a normal distribution. The mean height is 172.36...
9.8K
Projectile Motion: Example01:18

Projectile Motion: Example

14.3K
The theory of projectile motion is very useful for players of several sports to improve their performance. For example, a javelin thrower needs to throw their javelin in such a way that it travels as far as possible. The javelin thrower takes a short run-up to increase the initial speed of the javelin. The range of a projectile is at its maximum at a 45° angle so javelin throwers try to angle their throw as close to 45° as possible.
When we speak of the range (R) of a projectile on...
14.3K
Coefficient of Correlation01:12

Coefficient of Correlation

8.9K
The correlation coefficient, r, developed by Karl Pearson in the early 1900s, is numerical and provides a measure of strength and direction of the linear association between the independent variable x and the dependent variable y.
If you suspect a linear relationship between x and y, then r can measure how strong the linear relationship is.
What the VALUE of r tells us:
The value of r is always between –1 and +1: –1 ≤ r ≤ 1.
The size of the correlation r indicates the...
8.9K
z Scores and Area Under the Curve01:17

z Scores and Area Under the Curve

19.9K
z scores are the standardized values obtained after converting a normal distribution into a standard normal distribution. A z score is measured in units of the standard deviation. The z score tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a z score of...
19.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Integration of the Clinical Pharmacist Practitioner to Improve Rural Veteran Access and Quality for Chronic Obstructive Pulmonary Disease in Primary Care.

The Journal of rural health : official journal of the American Rural Health Association and the National Rural Health Care Association·2026
Same author

Symptomatic Changes Associated With a Pharmacist-Led COPD Program.

Chronic obstructive pulmonary diseases (Miami, Fla.)·2026
Same author

Potential Surprise Charges and Avoidable Transfers of Patients With Traumatic Intracranial Hemorrhage at an Academic Care Center.

Neurosurgery·2026
Same author

Superiority of Cone Beam Computed Tomography Over Intraoral Radiography for Detection of Periapical Lucency in Complicated Fractures of the Maxillary Fourth Premolar Teeth in Dogs.

Journal of veterinary dentistry·2026
Same author

Development and Implementation of a Critical Care Transport Physical Ability Test: An Administrative Case Report.

International journal of sports physical therapy·2025
Same author

Ultrasound quantitative characterization of tendinopathy with shear wave elastography in an ex vivo porcine tendon model.

European radiology experimental·2025

Related Experiment Video

Updated: Mar 11, 2026

Importance of Jumping Ability in Handball Throwing Speed and Accuracy
02:43

Importance of Jumping Ability in Handball Throwing Speed and Accuracy

Published on: April 4, 2025

1.6K

Youth Baseball Pitching Stride Length: Normal Values and Correlation With Field Testing.

Karl E Fry1, Andrew Pipkin2, Kelcie Wittman1

  • 1Sports Rehabilitation at The American Center, University of Wisconsin Hospital and Clinics, Madison, Wisconsin.

Sports Health
|November 20, 2016
PubMed
Summary
This summary is machine-generated.

Youth pitchers have a significantly shorter stride length than professionals. Stride length in youth baseball pitching correlates with power, balance, and experience, aiding injury prevention.

Keywords:
pitchersthrowing mechanicsyouth baseball

More Related Videos

Influence of Step-Width Manipulation on Running Biomechanics
06:53

Influence of Step-Width Manipulation on Running Biomechanics

Published on: February 28, 2025

1.1K
Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step
07:19

Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step

Published on: June 16, 2021

3.3K

Related Experiment Videos

Last Updated: Mar 11, 2026

Importance of Jumping Ability in Handball Throwing Speed and Accuracy
02:43

Importance of Jumping Ability in Handball Throwing Speed and Accuracy

Published on: April 4, 2025

1.6K
Influence of Step-Width Manipulation on Running Biomechanics
06:53

Influence of Step-Width Manipulation on Running Biomechanics

Published on: February 28, 2025

1.1K
Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step
07:19

Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step

Published on: June 16, 2021

3.3K

Area of Science:

  • Sports Biomechanics
  • Baseball Performance Analysis

Background:

  • Pitching biomechanics are crucial for performance and injury prevention in baseball.
  • Established norms for youth pitching stride length are lacking, leading to the use of professional data for young athletes.

Purpose of the Study:

  • To determine average youth pitching stride length and compare it to college and professional pitchers.
  • To investigate correlations between stride length, lower extremity power, balance, and pitching experience in youth pitchers.

Main Methods:

  • A prospective cohort study involving 92 youth baseball pitchers (aged 9-14).
  • Stride length was measured using 2D video analysis (Dartfish).
  • Evaluated correlations with vertical jump, single-leg stance time, leg length, weight, age, and pitching experience.

Main Results:

  • Mean youth pitching stride length was 66.0% of height.
  • Stride length positively correlated with vertical jump (0.38), pitching experience (0.36), and single-leg balance (0.28) (P < 0.01).
  • No significant correlations were found between stride length and body weight, leg length, or age.

Conclusions:

  • Youth pitching stride length differs significantly from norms established for older, elite throwers.
  • Stride length is a practical measure for assessing pitching biomechanics, useful for injury rehabilitation and prevention programs.