Effect of Prolonged Military Exercises With High Load Carriage, on Neuromuscular Fatigue and Physiological/Biomechanical Responses
This study has been completed.
Sponsor:
Centre Hospitalier Universitaire de Saint Etienne
Information provided by (Responsible Party):
Centre Hospitalier Universitaire de Saint Etienne
ClinicalTrials.gov Identifier:
NCT01127191
First received: May 11, 2010
Last updated: July 24, 2012
Last verified: July 2012
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Purpose
Land military missions generally combine prolonged walking/moderate-pace-running and other physical actions such as creeping, jumping, shooting,… which are associated with the direct carrying of high to severe loads of equipment and supplies (20-30 to 50 kg) by soldiers. For an infantry section, "typical" intervention phases last about 20-24 h and combine variable intensity grades. Consequently, military mission characteristics are an interesting investigation field of human fatigue. Previous studies have investigated human neuromuscular alterations after prolonged "normal" locomotion exercises [Millet et al., 2004, 2009], thus the aim of this study is to characterize the neuromuscular determinants of fatigue induced by a 24-h Simulated Military Effort (SME) and a 4-h Military Road March (MM), both performed with high load carriage. Additionally, the consequences of fatigue on physiological and biomechanical parameters of locomotion will be investigated.
| Condition | Intervention |
|---|---|
|
Healthy |
Other: military equipment |
| Study Type: | Observational |
| Study Design: | Observational Model: Cohort Time Perspective: Prospective |
Resource links provided by NLM:
Further study details as provided by Centre Hospitalier Universitaire de Saint Etienne:
Primary Outcome Measures:
- Central fatigue quantification based on voluntary and electrically-induced force measurement on activated muscle. [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
- Peripheral fatigue based on electrically-induced force measurement on the same muscle in relaxed condition. [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
Secondary Outcome Measures:
- Oxygen uptake, carbon-dioxide output, energetic-cost of locomotion and respiratory ratio, based on subject's gas exchanges. [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
- Lactatemia, based on subject's arterialized capillary blood samples analysis [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
- Muscular electrical activities, based on subject's surface EMG analysis [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
- Heart rate frequence [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
- Walking and running mechanics, measured by an instrumented treadmill [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
- Postural equilibration, measured by a piezo-dynamometric double platform [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
- Rate of perceived exertion, measured by the Borg scale ranging from 6 to 20 [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
- Perceived comfort, measured by a 10 cm visual analogic scale (VAS) [ Time Frame: after a a military exercise of 24 hours ] [ Designated as safety issue: No ]
Biospecimen Retention: Samples Without DNA
Lactatemia, based on subject's arterialized capillary blood samples analysis.
| Enrollment: | 10 |
| Study Start Date: | March 2010 |
| Study Completion Date: | April 2010 |
| Primary Completion Date: | April 2010 (Final data collection date for primary outcome measure) |
| Groups/Cohorts | Assigned Interventions |
|---|---|
| Military |
Other: military equipment
Military exercise of 24 hours
|
Eligibility| Ages Eligible for Study: | 30 Years to 45 Years |
| Genders Eligible for Study: | Male |
| Accepts Healthy Volunteers: | Yes |
| Sampling Method: | Probability Sample |
Study Population
military retreated from national army
Criteria
Inclusion Criteria:
- to be a male
- to have a VO2max > 45ml/min/kg (mean observed value in military subjects)
- to be aged from 30 to 45
- to be recently retreated from National Army
- to be highly experienced in military efforts
- to be trained in exercises involving load carrying
- to benefit from a social security insurance
Exclusion Criteria:
- All subjects with recent (< 3 month) bone, articular or muscle diseases.
- All subjects presenting a clinic sign of intolerance to testing procedures, especially subjects with knee, ankle, hip or back diseases.
- All subjects intolerant to muddy or wooded environment.
- All subjects presenting a clinic sign of intolerance to exercise, and particularly to running or walking while carrying a load
- All subjects involved at the same time in another medical research
- All subjects militarily active
- All subjects with cardiac or pulmonary identified and known diseases
Contacts and Locations More Information
No publications provided by Centre Hospitalier Universitaire de Saint Etienne
Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
| Responsible Party: | Centre Hospitalier Universitaire de Saint Etienne |
| ClinicalTrials.gov Identifier: | NCT01127191 History of Changes |
| Other Study ID Numbers: | 0901110, 2009-A01346-51 |
| Study First Received: | May 11, 2010 |
| Last Updated: | July 24, 2012 |
| Health Authority: | France: Afssaps - Agence française de sécurité sanitaire des produits de santé (Saint-Denis) |
Keywords provided by Centre Hospitalier Universitaire de Saint Etienne:
|
military exercises neuromuscular fatigue physiological responses biomechanical responses |
simulated military effort high load carriage Healthy voluntary |
ClinicalTrials.gov processed this record on May 23, 2013