Lower Limb Mechanical Characteristics: Effect on Running Mechanics and Energetics
Inter-individual variability in energetic cost of running may be partly explained by lower limbs mechanical characteristics. The transposition of muscle mechanical model with two components (contractile and elastic) to the whole lower limb mechanical behavior analysis during running. The main aim of present investigation is to study the effects of lower limb mechanical characteristic (force, velocity, stiffness) on the energetic cost of running using a lower limb mechanical approach including both contractile and elastic components.Twenty healthy men will run on a treadmill at 12km.h-1 in 8 different 5 min-conditions. Through conditions, stride frequency, sole stiffness and subject's body weight will be changed to allow artificial variations in lower limb mechanical characteristics. Energetic and non-invasive mechanical measurements analysis will be performed to obtain energetic cost of running and to compute force, velocity and stiffness of lower limbs for each condition.
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Basic Science
|Official Title:||Lower Limb Mechanical Characteristics: Effect on Running Mechanics and Energetics|
- the energetic cost of running: the energetic cost (Oxygen consumption by meter covered) is calculated by the ratio of oxygen consumption on the running velocity. [ Time Frame: within 4 weeks after inclusion ] [ Designated as safety issue: No ]
|Study Start Date:||January 2008|
|Study Completion Date:||March 2008|
|Primary Completion Date:||February 2008 (Final data collection date for primary outcome measure)|
Other: energetic and non invasive limb mechanical measurements
Force velocity stiffness running
Main aim: Identify the effect of mechanical characteristic induced on lower limbs on the energetic cost of running.
Secondary aim : Minimize the energetic cost of running by lower limb mechanical characteristics optimization.
|Service de Physiologie clinique et de l'exercice - CHU Saint-Etienne|
|Saint-Etienne, France, 42055|
|Principal Investigator:||Roger OULLION, MD PhD||CHU de Saint-Etienne|