Fencing is an Olympic sport composed of three different weapons (foil, sabre and épée), with specific rules and target areas. This open-skilled sport involves high levels of neuromuscular coordination, strength and power. To score against their opponent during attacks, one of the most frequent action used is the lunge. This technical action requires an explosive extension of the trailing leg to perform a forceful move forward of the weapon in order to quickly touch their opponent. During this attack, the fencer makes certain adjustments to change the goal according to the response of the opponent. The complexity of the visual stimulus selection lead to a decrease of the attack performance (Sanderson 1983). The impact of the stimulus complexity selection is mainly assessed through the notion of uncertainty (Gutiérrez-Dávila et al. 2014), especially the effect of target change during the attack (Gutiérrez-Dávila et al. 2013). Adjustments are prone to appear at different descriptive levels of motor control, especially at the muscular level. The goal of this pilot study is to evaluate the adaptation of the fencer`s muscle synergies during the attack, when visual perturbations occur.
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