Sghaier Nour, Fumery Guillaume, Fourcassié Vincent, Turpin Nicolas A, Moretto Pierre
Centre de Recherches Sur La Cognition Animale, Centre de Biologie Intégrative, Université de Toulouse, CRCA, UMR CNRS-UPS 5169, 118 Route de Narbonne, 31062 Toulouse, France.
IRISSE Lab (EA 4075), UFR SHE, Sport Sciences Department (STAPS), Université de La Réunion, 117, rue du général Ailleret, 97430 le Tampon, France.
R Soc Open Sci. 2022 Aug 24;9(8):220636. doi: 10.1098/rsos.220636. eCollection 2022 Aug.
Team lifting is a complex and collective motor task comprising motor and cognitive components. The purpose of this research is to investigate how individual and collective performances are impacted during load transport combined with a cognitive task. Ten dyads performed a first condition in which they transported a load (CC), and a second one in which they transported the load while maintaining a ball on its top (PC). The recovery-rate, amplitude and period of the centre-of-mass (COM) trajectory were computed for the system (dyad + table = PACS). We analysed the forces and moments exerted at each joint of the upper limbs of the participants. We observed a decrease in the overall performance of the dyads during PC: (i) the velocity and amplitude of CoM decreased by 1.7% and 5.8%, respectively, (ii) inter-participant variability of the Moment-Cost-Function and recovery rate decreased by 95%, and 19.2%, respectively during PC. Kinetic synergy analysis showed that the participants reorganized their coordination in the PC. We demonstrated that adding a precision task affects the economy of collective load carriage at the PACS level while the upper-limbs joint moments were better balanced across the paired participants for the PC.
团队抬举是一项复杂的集体运动任务，包括运动和认知成分。本研究的目的是调查在负载运输与一项认知任务相结合的过程中，个体和集体表现是如何受到影响的。十对二人组进行了第一个条件的测试，即他们搬运一个负载（CC），以及第二个条件的测试，即他们在负载顶部保持一个球的同时搬运负载（PC）。计算了系统（二人组 + 桌子 = PACS）质心（COM）轨迹的恢复率、幅度和周期。我们分析了参与者上肢每个关节施加的力和力矩。我们观察到在PC条件下二人组的整体表现有所下降：（i）质心的速度和幅度分别下降了1.7%和5.8%，（ii）在PC条件下，参与者间力矩成本函数和恢复率的变异性分别下降了95%和19.2%。动力学协同分析表明，参与者在PC条件下重新组织了他们的协调方式。我们证明，增加一项精确任务会影响PACS水平上集体负载搬运的经济性，而对于PC条件，上肢关节力矩在配对参与者之间得到了更好的平衡。
