Hamstring Quadriceps Ratio
Calculate isokinetic hamstring/quadriceps torque ratio against caller limits.
Description
The hamstring/quadriceps ratio compares peak torque on a shared measurement basis.
The hamstring/quadriceps ratio compares peak torque on a shared measurement basis. A supplied interval screens the result.1
Calculate isokinetic hamstring/quadriceps torque ratio against caller limits.
When to use Hamstring Quadriceps Ratio
Use this tool to calculate isokinetic hamstring/quadriceps torque ratio against caller limits.
Prepare the measured movement, timing, load or preassigned score requested. Keep protocols, units, paired measurements and caller-selected thresholds consistent.
How to use Hamstring Quadriceps Ratio and understand its results
- Prepare the measured movement, timing, load or preassigned score requested. Keep protocols, units, paired measurements and caller-selected thresholds consistent.
- Enter hamstringPeakTorqueNm, quadricepsPeakTorqueNm, ratioLower, ratioUpper using the field table and calculation rules, then run the tool.
- Read hamstringQuadricepsRatio, withinRange. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| hamstringPeakTorqueNm | Hamstring peak torque nm | number | Required |
| quadricepsPeakTorqueNm | Quadriceps peak torque nm | number | Required |
| ratioLower | Ratio lower | number | Required |
| ratioUpper | Ratio upper | number | Required |
Enter nonnegative hamstring torque, positive quadriceps torque and ordered nonnegative ratio bounds. Return ratio and inclusive interval flag.
ratio=hamstring/quadriceps Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| hamstringQuadricepsRatio | Hamstring quadriceps ratio | number |
| withinRange | Within range | boolean |
{
"input": {
"hamstringPeakTorqueNm": 120,
"quadricepsPeakTorqueNm": 200,
"ratioLower": 0.5,
"ratioUpper": 0.7
},
"output": {
"hamstringQuadricepsRatio": 0.6,
"withinRange": true
}
}Limitations and assumptions
Contraction type, angular speed, protocol and rehabilitation suitability are not validated.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Limb Symmetry Index: Calculate limb symmetry index from the supplied measurements. For a complementary task, use Torque Curve Sticking Point: Locate the minimum measured torque and corresponding joint angle.
References
-
Hamstring Quadriceps Ratio — tool.io
Similar or alternative tools
- Limb Symmetry Index
Calculate limb symmetry index from the supplied measurements.
- Torque Curve Sticking Point
Locate the minimum measured torque and corresponding joint angle.