Transtibial amputation accounts for 3,700 cases per year in France. Athletes can use sport blades made of carbon plate for improved energy restitution.
Sports blades are adjusted according to the manufacturer's recommendations and the subjective experience of the ortho-prosthetist and patient. These adjustments are designed to optimize performance and comfort while reducing the risk of injury. This risk is all the greater when asymmetries between the healthy and affected limbs are large, exposing the healthy limb to large and repeated reaction forces.
Male or female,
Weighing less than 110 kg, in accordance with C-blade recommendations,
Subjects who have undergone a unilateral transtibial amputation,
Have been running with a sports blade for at least 3 months, over several sessions of at least 3 kilometers.
Subjects whose amputation is due to complications related to diabetes or atherosclerosis.
Subjects with chronic or central neurological pathologies
Subjects with cardiovascular disorders
Subjects with alcohol or drug dependency.
Crossover
Warm-up
Other intervention5-minute warm-up run on treadmill at a freely chosen speed
Random blade test
Other intervention4-minute run on a treadmill with a flat incline.
Random blade test
Other intervention4-minute run on treadmill with a 10% gradient
Comfort speed test
Other intervention1 min running test on an instrumented treadmill (Gaitway, H/P/Cosmos, Nußdorf, Germany) at comfort speed.
Outdoor random blade test
Other intervention100-metre outdoor run at a comfort speed
Oxygen consumption measurement
4-minute flat run on a treadmill at comfort speed
Oxygen consumption measurement
4-minute up hill run (+10%), on a treadmill at comfort speed
Kinematic analysis
Slope-dependent kinematic analysis by measuring joint angles (in degrees), moments (Nm) and net joint forces at ankle, knee and hip (in Nm/Kg), ground reaction forces (in N/Kg) during a 1-minute run on different slopes (downhill -10%, flat, uphill +10%).
Cadence of running (in steps per minutes)
Cadence of running according to slope (downhill -10%, flat, uphill +10%) and terrain, measured during a 1-minute run on a carpet
Stride length (in meters) of running
Stride length of running according to slope (downhill -10%, flat, uphill +10%) and terrain, measured during a 1-minute run on a carpet
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