Adelyons Software

Sports & fitness guides

Pitch speed, exit velocity, jump training, golf and body measurement, explained by the people who build the apps that measure them.

Axis Body Fat Percentage Chart for Men and Women
A body fat percentage chart for men and women, what each category means, why women's ranges run higher, and how age and measurement method change the number.
Axis How to Measure Body Fat at Home — Methods and Accuracy
How to measure body fat percentage at home: tape measure, calipers, bioimpedance scales, and photo estimates compared, plus how to get readings you can actually trend.
Axis How to Take Body Measurements with a Tape Measure
Where to place the tape for neck, chest, waist, hips, arm, thigh, and calf measurements, how tight to pull it, and how often to remeasure for usable progress data.
Baseball Tracker Average Pitch Speed by Age — Typical Fastball Ranges
Typical fastball velocity by age, from 8U through high school and college, plus why the ranges overlap and what actually adds pitch speed.
Baseball Tracker How to Measure Pitch Speed with a Phone — Camera Setup That Works
How to measure pitch speed with a phone: camera angle, frame rate, distance, and lighting that produce a usable velocity reading from video.
Baseball Tracker What Is a Good Exit Velocity by Age — Typical Ranges Explained
What counts as a good exit velocity at 10U through college, how max and average exit velocity differ, and what actually raises the number.
MyOVR Football Position Attributes Explained — What Matters at Each Position
Which football attributes matter at each position, from quarterback to defensive back, and how to weight them when you rate yourself honestly.
MyOVR How to Build a Weekly Football Training Plan — Offseason and In-Season
How to structure a football training week: speed, strength, position skill, conditioning, and recovery, plus how the plan changes once the season starts.
MyOVR What Is an OVR Rating in Football? — How Overall Ratings Are Built
An OVR rating is one number that summarizes a football player's ability by weighting the attributes that matter at their position. Here is how it works.
Par Card Golf game formats explained — Stroke Play, Stableford, Match Play, Skins, Nassau
How Stroke Play, Stableford, Match Play, Skins, and Nassau are scored, the standard Stableford points, and which format suits your group.
Par Card Front, center, and back yardages — how to use golf GPS distances
Golf GPS shows three numbers: front, center, and back of the green. What each means, when to use which, and how pin position should change your club.
Par Card Golf handicap index explained — how it is calculated
Your handicap index averages the best 8 score differentials from your last 20 rounds. See the formula, what course rating and slope do, and how to use it.
Pitch & Swing Lab Attack Angle in Baseball — What It Is and What Yours Should Be
Attack angle is the up-or-down angle of the bat's path at contact. Here is what it means, typical ranges, how it differs from launch angle, and how to measure it.
Pitch & Swing Lab Average Bat Speed by Age — Typical Ranges for Youth to Adult
Typical bat speed ranges by age group, from 8U through high school, college and pro — plus why the numbers vary so much and how to measure your own.
Pitch & Swing Lab How to Film a Swing for Video Analysis — Camera Angle & Settings
Where to put the camera, what frame rate to use, and how to light and frame a baseball or softball swing or pitch so video analysis gives usable numbers.
PlyometricAI Average Vertical Jump by Age and Level — Typical Ranges
Typical vertical jump ranges by age and training level, from youth to elite jump-sport athletes, plus how to read your own number honestly.
PlyometricAI How High Do You Have to Jump to Dunk — By Height
The rim is 10 feet. Work out the vertical you need to dunk from your standing reach, with an approximate by-height table and the factors that change it.
PlyometricAI How to Measure Your Vertical Jump — Four Accurate Methods
Measure your vertical jump accurately: subtract standing reach from jump reach. Wall-and-chalk, Vertec, jump mat, and video methods compared.
VolleyVelocity How Fast Is a Volleyball Spike — Typical Speeds by Level
Typical volleyball spike speeds by level, from youth to professional, plus what makes a spike fast and how spike speed is measured.
VolleyVelocity How to Spike a Volleyball Harder
How to hit a volleyball harder: approach timing, contact point, arm swing mechanics, and hip rotation, plus how to check whether a change actually added speed.
VolleyVelocity How to Measure Volleyball Spike Speed With Your Phone
Camera angle, distance, frame rate, and lighting for filming a volleyball spike so the speed can be measured accurately from your phone video.