Triple Extension Sequence Check
Check hip, knee, and ankle peak timing against caller-defined sequencing criteria.
Description
Triple-extension sequencing compares peak timings from hip through knee to ankle.
Triple-extension sequencing compares peak timings from hip through knee to ankle. Strict temporal order is distinct from meeting a minimum gap.1
Check hip, knee, and ankle peak timing against caller-defined sequencing criteria.
When to use Triple Extension Sequence Check
Use this tool to check hip, knee, and ankle peak timing against caller-defined sequencing criteria.
Prepare the measured movement, timing, load or preassigned score requested. Keep protocols, units, paired measurements and caller-selected thresholds consistent.
How to use Triple Extension Sequence Check 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 hipPeakMilliseconds, kneePeakMilliseconds, anklePeakMilliseconds, minimumGapMilliseconds using the field table and calculation rules, then run the tool.
- Read proximalToDistal, hipKneeGapMilliseconds, kneeAnkleGapMilliseconds, meetsGapCriterion. 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 |
|---|---|---|---|
| hipPeakMilliseconds | Hip peak time (ms) | number; minimum: 0 | Required |
| kneePeakMilliseconds | Knee peak time (ms) | number; minimum: 0 | Required |
| anklePeakMilliseconds | Ankle peak time (ms) | number; minimum: 0 | Required |
| minimumGapMilliseconds | Minimum phase gap (ms) | number; minimum: 0 | Required |
Enter nonnegative ms timings and minimum gap. Return signed gaps, proximal-to-distal order and a gate requiring both strict order and gaps≥minimum. Equal peak times fail even with zero minimum.
gaps=knee−hip, ankle−knee; ordered=both gaps>0 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| proximalToDistal | Proximal-to-distal order | boolean |
| hipKneeGapMilliseconds | Hip-knee gap (ms) | number |
| kneeAnkleGapMilliseconds | Knee-ankle gap (ms) | number |
| meetsGapCriterion | Meets gap criterion | boolean |
{
"input": {
"hipPeakMilliseconds": 100,
"kneePeakMilliseconds": 150,
"anklePeakMilliseconds": 210,
"minimumGapMilliseconds": 30
},
"output": {
"proximalToDistal": true,
"hipKneeGapMilliseconds": 50,
"kneeAnkleGapMilliseconds": 60,
"meetsGapCriterion": true
}
}Limitations and assumptions
No joint kinematics, power transfer or performance quality is inferred from timing alone.
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 Torque Curve Sticking Point: Locate the minimum measured torque and corresponding joint angle. For a complementary task, use Snatch Catch Stability Screen: Compare snatch catch depth and sway with caller-defined stability limits.
References
-
Triple Extension Sequence Check — tool.io
Similar or alternative tools
- Torque Curve Sticking Point
Locate the minimum measured torque and corresponding joint angle.
- Snatch Catch Stability Screen
Compare snatch catch depth and sway with caller-defined stability limits.