Advanced SBJ Input Form
Formula Used
This calculator uses a customizable planning equation. It estimates standing broad jump distance from body size, power, speed, readiness, and selected coefficients.
SBJ = B + H×Ch + L×Cl + VJ×Cv - W×Cw - ST×Cs + A×Ca + TF×Ct + SexAdj
- B is the base value.
- H is height in centimeters.
- L is leg length in centimeters.
- VJ is vertical jump in centimeters.
- W is body weight in kilograms.
- ST is sprint time in seconds.
- A is age.
- TF is training factor from 0 to 10.
How to Use This Calculator
- Select your length and weight units.
- Enter age, height, leg length, and body weight.
- Add vertical jump and sprint time.
- Choose a training factor from 0 to 10.
- Edit coefficients when your coach uses custom values.
- Press the calculate button.
- Review the result above the form.
- Download the CSV or PDF report.
Example Data Table
| Example | Height | Leg Length | Weight | Vertical Jump | Sprint Time | Training Factor | Estimated SBJ |
|---|---|---|---|---|---|---|---|
| Beginner | 160 cm | 82 cm | 62 kg | 32 cm | 4.30 s | 3 | 134.08 cm |
| Intermediate | 170 cm | 90 cm | 70 kg | 45 cm | 3.60 s | 5 | 171.85 cm |
| Advanced | 182 cm | 98 cm | 78 kg | 62 cm | 3.10 s | 8 | 215.51 cm |
SBJ Calculator Guide
What This Tool Estimates
The SBJ calculator estimates standing broad jump distance. It uses body measurements, speed data, power data, and readiness values. The result gives a practical training estimate. Coaches can use it for planning. Athletes can use it for tracking. The tool also converts the result. It shows centimeters, inches, feet, and meters.
Why Inputs Matter
Height and leg length affect reach and leverage. Vertical jump can show lower body power. Sprint time can show quick force production. Body weight can change movement demand. Age and training factor add context. These values do not replace testing. They help create a structured estimate before or after a field session.
Using Custom Coefficients
The coefficient fields make the calculator flexible. A school, club, or coach may collect its own data. Those values can be entered into the equation. This makes the calculator useful for different groups. A beginner group may need softer values. A trained group may need stricter values. Custom settings help match the formula to real athletes.
Understanding the Rating
The rating is based on jump distance compared with height. This creates a simple relative score. A taller athlete does not always get an automatic advantage. The index shows how far the athlete jumps compared with body size. This makes comparison easier. It also keeps progress clear across training blocks.
Exporting Results
CSV export is useful for spreadsheets. PDF export is useful for records. A coach can save reports after each test day. An athlete can compare old reports with new reports. The measured SBJ field also helps. It shows the difference between predicted and actual performance. That gap can guide future training decisions.
FAQs
What does SBJ mean?
SBJ usually means standing broad jump. It measures how far a person can jump forward from a standing start. It is often used to check lower body power.
Is this result a final athletic score?
No. The result is an estimate. Real testing is still important. Use this calculator for planning, comparison, and quick performance review.
Can I change the formula?
Yes. The coefficient fields let you adjust the equation. This helps when a coach, school, or research group uses its own tested values.
Which units can I use?
You can enter length values in centimeters or inches. You can enter body weight in kilograms or pounds. The calculator converts values internally.
Why is sprint time subtracted?
Lower sprint time usually means faster acceleration. A higher sprint time may reduce the estimate because it suggests slower force production.
What is the training factor?
The training factor is a readiness score from 0 to 10. Use a higher value when training quality, recovery, and confidence are strong.
What does the relative index show?
The relative index compares predicted jump distance with height. It helps compare athletes of different sizes with a simpler body-size based score.
Can I export my result?
Yes. Use the CSV button for spreadsheet records. Use the PDF button for a clean report that can be saved or shared.