# PWR-020 — Fatigue resistance: learner worksheet Release: Revision 7T · Full Tutorial Edition Estimated time: Estimated 11 min reading; practical time is provider-set Difficulty: Intermediate Equipment: Specialist equipment — Calibrated handgrip dynamometer with visible target band; Recorded handle position and supported arm posture; Work-rest timer; Force-trace export or session sheet; A handgrip-pulse record for device and handle, side, posture, current baseline, target band, work-rest timing, each pulse, errors, decrement and symptoms. Space: Specialist setting Automated structural checklist: 10 of 10 structural checks present Evidence quality/context: G4; Deep research depth Automated method-quality band: Comprehensive Method-rating basis: Structure coverage, instruction/check specificity, alternative distinctness, source troubleshooting, comparison depth and whether purpose/check fields are authored rather than derived. Editorial review: Pending manual editorial sign off ## Before you begin - [ ] I read the tutorial authority and stop conditions. - [ ] I have the required equipment/space or a declared accessible alternative. ## Canonical source context Fatigue resistance is preservation of a declared task's output and quality across a fixed workload and recovery schedule. This lesson teaches a supervised handgrip-pulse task: establish one submaximal target, squeeze into a visible band for a fixed time, release fully for a fixed interval, repeat the predeclared count and stop when force, timing or grip position fails. The provider controls target, repetitions, work-rest timing and whether fatigue induction is appropriate. Target outcome: The learner completes a provider-set series of handgrip pulses while valid force, time-in-band, errors and decrement are tracked separately. ### Authority and setup conditions - Confirm hand, handle setting, arm position, target band, pulse count, work time and rest time. - Report hand, wrist, elbow, neck or neurological symptoms and recent injury. - Demonstrate full relaxation to baseline before the next pulse. - Set the handle, hand, arm and posture from the reference record and watch one complete squeeze-and-release at low force. Begin only when the setup stays still and the hand fully relaxes. - Use low-force pulses to find the target band and practise full relaxation during the fixed recovery interval before recorded work begins. ### Required or supplied materials - Calibrated handgrip dynamometer with visible target band - Recorded handle position and supported arm posture - Work-rest timer - Force-trace export or session sheet - A handgrip-pulse record for device and handle, side, posture, current baseline, target band, work-rest timing, each pulse, errors, decrement and symptoms. ## 1. Set hand and arm Use the recorded handle position, wrist angle and supported elbow posture; keep the other hand off the device. Why: Grip leverage changes force and fatigue. Success check: The setup matches the reference and remains still. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “The setup matches the reference and remains still.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 2. Find the target band Complete one low familiarisation squeeze, raising force smoothly into the band without overshoot. Why: The task measures controlled repeat output, not an explosive peak. Success check: The trace enters the band once and stays there. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “The trace enters the band once and stays there.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 3. Hold for the fixed time Keep force inside the band until the hold cue ends while breathing and keeping the wrist still. Why: Time and force quality must both be preserved. Success check: The trace stays in band for the required interval. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “The trace stays in band for the required interval.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 4. Release completely Relax until the trace returns to baseline, then leave the hand open for the full recovery interval. Why: Partial release adds unmeasured duty and fatigue. Success check: Every recovery begins at baseline; the visible 'Release completely' check is satisfied. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “Every recovery begins at baseline; the visible 'Release completely' check is satisfied.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 5. Repeat without compensation Begin the next pulse only on the cue; do not change handle position, brace with the trunk or use the other hand. Why: Compensation can hide local performance loss. Success check: Posture and handle remain unchanged; the visible 'Repeat without compensation' check is satisfied. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “Posture and handle remain unchanged; the visible 'Repeat without compensation' check is satisfied.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 6. Stop at the declared failure End the series when force leaves the band, release is incomplete, timing fails or symptoms reach the stop rule. Why: The endpoint is preserved task quality, not exhaustion. Success check: No extra pulse follows the first failure. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “No extra pulse follows the first failure.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 7. Separate output, errors and decrement Record force for each pulse, time-in-band, first error and the predeclared decrement. Report symptoms and recovery separately. Why: Mean output and decrement can move independently. Success check: Raw pulses remain visible beside the summary. Accessible alternative: Ask the qualified provider to adapt positioning, cue modality, pace, interface or rest while preserving this step’s declared check: “Raw pulses remain visible beside the summary.” If an adaptation changes the measured task or configuration, record it as a different configuration rather than an equivalent attempt. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## Reflection What changed? ________________________________________________________________________________ What remains difficult? ________________________________________________________________________________ What will I repeat, adapt, ask for help with, or stop? ________________________________________________________________________________ --- Completion of this worksheet demonstrates tutorial participation only. It does not establish capability, qualification, safety clearance, diagnosis, treatment or independent validation.