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| ID | Type | Description | Link |
|---|---|---|---|
| 2022-A00219-34 | Other Identifier | ANSM |
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During running, each contact between the foot and the ground causes an impact. Ground reaction forces (GRF) are considered as an input into the musculoskeletal system. It involves a sudden deceleration in the lower limb packages (including muscles) which generates Soft-Tissue Vibrations (STV). The body is able to attenuate Soft-Tissue Vibrations (STV) but this capability decreases with fatigue. STV could be minimize by improving shoe midsole hardness.
Only 4 studies have studied Soft-Tissue Vibrations (STV) with a distance not exceeding 10 km and without evaluating the potential influence of the shoe. Thus, the effects of shoe midsole hardness on Soft-Tissue Vibrations (STV) and neuromuscular fatigue at the end of an intense and/or long run remains unknown.
The purpose is to compare two shoes whose only midsole hardness differs during a half-marathon on Soft-Tissue Vibrations (STV), neuromuscular fatigue and running kinetics.
Maybe the shoe ensuring a better STV damping of the medial gastrocnemius muscle would reduce neuromuscular fatigue and improve comfort.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Hard shoes runners | Experimental | Half-marathon runners with hard shoes preceded and followed by assessment of neuromuscular fatigue. |
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| Soft shoes runners | Active Comparator | Half-marathon runners with soft shoes preceded and followed by assessment of neuromuscular fatigue. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| "hard shoes" runners evaluation | Other | The "hard shoes" runners get on the treadmill for 21 km at a speed corresponding to 70 percent (%) of their the maximum aerobic speed (MAV) and are evaluated. |
| Measure | Description | Time Frame |
|---|---|---|
| Change of the damping coefficient (in percent %). | The main evaluation criterion will be the relative variation (in percent %) of the damping coefficient (in /s) of the medial gastrocnemius muscle measured with an accelerometer, at the beginning (the first five minutes) and at the end (the last five minutes) of 21 km at a speed corresponding to 70% of the maximum aerobic speed (MAS) on a treadmill, carried out by experienced amateurs during two shoe conditions: soft and firm sole. | From the beginning to the end of the 21 km race. |
| Measure | Description | Time Frame |
|---|---|---|
| Temporal evolution of vibrations measurements. | The relative variation (in percent %) of the damping coefficient (in /s) of the medial gastrocnemius muscle will be measured with an accelerometer every 3 km at a speed corresponding to 70% of the maximum aerobic speed (MAS) on a treadmill, carried out by confirmed amateurs during the two shoe conditions. For this outcome, it is not possible to use an unit of time, because the time of the measurements are define only by the distance covered by the subject. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| LEONARD FEASSON, MDPHD | CHU de Saint-Etienne | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Centre Hospitalier Universitaire de Saint-Etienne | Saint-Etienne | 42055 | France |
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| "Soft shoes" runners evaluation | Other | The "soft shoes" runners get on the treadmill for 21 km at a speed corresponding to 70 percent (%) of their the maximum aerobic speed (MAV) and are evaluated. |
|
| Kilometers : 1st, 3rd, 6th, 9th, 12th, 15th, 18th, 21st |
| Evaluation of improved vibration damping on neuromuscular fatigue : isometric force | The relative change (in percent %) in the maximum isometric force (in Newton) of the ankle plantar flexors before and after the 21 km | From the beginning to the end of the 21 km race. |
| Evaluation of improved vibration damping on neuromuscular fatigue : jerk amplitude. | The relative change (in percent %) in jerk amplitudes measured by electrically evoked force (in Newton) after isometric contraction of the plantar flexors of the ankle, before and after the 21 km. | From the beginning to the end of the 21 km race. |
| Evaluation of improved vibration damping on neuromuscular fatigue : level of voluntary activation. | The relative change (percent %) in the maximum level of voluntary activation (percent %) measured in isometric mode of the plantar flexors of the ankle before and after the 21 km | From the beginning to the end of the 21 km race. |
| Evaluation of improved vibration damping on neuromuscular fatigue : plantar flexors. | The relative change (in percent %) in the maximum isometric force (in Newton) of the plantar flexors of the toes before and after the 21 km. | From the beginning to the end of the 21 km race. |
| Biomechanical parameters measurement : Ground reaction forces (Newton) | Ground reaction forces (in Newton, measured by treadmill force platforms). For this outcome, it is not possible to use an unit of time, because the time of the measurements are define only by the distance covered by the subject. | Kilometers : 1st, 3rd, 6th, 9th, 12th, 15th, 18th, 21st. |
| Biomechanical parameters measurement : Spatio-temporal parameters (second) | Spatio-temporal parameters: contact time (CT) and flight time (TV) For this outcome, it is not possible to use an unit of time, because the time of the measurements are define only by the distance covered by the subject. | Kilometers : 1st, 3rd, 6th, 9th, 12th, 15th, 18th, 21st. |
| Temporal evolution of the energy cost measurement | This will be the relative variation (in percent %) of the energy cost (in J/kg/m), measured continuously thanks to a portable gas exchange measurement system (ergo spirometer Metamax 3B®, Cortex Medical, Leipzig, Germany), at a speed corresponding to 70% of the maximum aerobic speed (MAS) on a treadmill, carried out by experienced amateurs during the two shoe conditions. | From the beginning to the end of the 21 km race. |
| ID | Term |
|---|---|
| D018908 | Muscle Weakness |
| ID | Term |
|---|---|
| D009135 | Muscular Diseases |
| D009140 | Musculoskeletal Diseases |
| D020879 | Neuromuscular Manifestations |
| D009461 | Neurologic Manifestations |
| D009422 | Nervous System Diseases |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D012816 | Signs and Symptoms |
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