Effect of Prolonged Military Exercises With High Load Carriage, on Neuromuscular Fatigue and Physiological/Biomechanical Responses
- Conditions
- Healthy
- Interventions
- Other: military equipment
- Registration Number
- NCT01127191
- Brief Summary
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.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- Male
- Target Recruitment
- 10
- 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
- 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
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Military military equipment -
- Primary Outcome Measures
Name Time Method Peripheral fatigue based on electrically-induced force measurement on the same muscle in relaxed condition. after a a military exercise of 24 hours Central fatigue quantification based on voluntary and electrically-induced force measurement on activated muscle. after a a military exercise of 24 hours
- Secondary Outcome Measures
Name Time Method Lactatemia, based on subject's arterialized capillary blood samples analysis after a a military exercise of 24 hours Oxygen uptake, carbon-dioxide output, energetic-cost of locomotion and respiratory ratio, based on subject's gas exchanges. after a a military exercise of 24 hours Walking and running mechanics, measured by an instrumented treadmill after a a military exercise of 24 hours Perceived comfort, measured by a 10 cm visual analogic scale (VAS) after a a military exercise of 24 hours Muscular electrical activities, based on subject's surface EMG analysis after a a military exercise of 24 hours Rate of perceived exertion, measured by the Borg scale ranging from 6 to 20 after a a military exercise of 24 hours Heart rate frequence after a a military exercise of 24 hours Postural equilibration, measured by a piezo-dynamometric double platform after a a military exercise of 24 hours
Trial Locations
- Locations (1)
CHU de Saint-Etienne
🇫🇷Saint-Etienne, France