EMG recordings during maximal isometric knee flexion, knee extension, hip abduction and plantar flexion will be used for normalisation of EMG data.
EMG recordings during maximal isometric knee flexion, knee extension, hip abduction and plantar flexion will be used to normalise EMG data during walking, one-leg rise and hop for distance tasks.
The main findings were: (a) identifiable differences in fascicle length of the GM at rest do not necessarily imply that these differences would also exist during a maximal isometric plantar flexion contraction and (b) the EMG activity of the biarticular GM during the MVC decreased at a pronounced flexed knee-joint position (up to 110°) despite of no differences in GM fascicle length.
Maximal isometric knee flexion and extension strength.
Maximal isometric knee flexion and extension strength of both legs, as well as grip strength of dominant hand, will be measured using an adjustable dynamometer chair (Good strength; Metitur Ltd ,Jyväskylä Finland).
Prior to and after the 5-min exposure to passive vibration, counter-movement jumping height, balance and maximal isometric knee flexion and extension strength were tested, in that order.
Maximal isometric plantar flexion torque was measured with a dynamometer at the ankle joint angle of 0° (defined as the angle at which the sole of the foot and the tibial bone are orthogonally positioned).
Nine healthy males performed maximal isometric knee extension and flexion contractions at 0°, 45° and 90° angles.
Maximal isometric knee extension and flexion strength, balance, and jumping performance were assessed before and after the experiment.
No differences in respiratory parameters, heart rate or blood lactate concentration were observed with or maximal isometric knee extension and flexion strength, balance, and jumping performance following simulated skiing for 3 min in the downhill tuck position were the same as in the absence of compression.
