Análise da percepção sobre estímulos mecânicos durante a corrida e os saltos / Analysis of the perception of mechanical stimuli during running and jumping

ABSTRACT

The aim of this study is to verify the correlation between load perception and component of Ground Reaction Force (GRF) during running and jumping. GRF and subjective data (Borg's Ratings of Perceived Exertion) were measured during two different conditions condition 1 (P1) during running on a treadmill, and condition 2 (P2) during landing. Although load impact was not an experimental factor for P1, dynamical variables related to GRE were affected by time (p<0.0001). However, some variables (Fy 1, Dt Fy 1, GC, and 1_75) and load perception were not correlated. Small range of mechanical load variation during P1 did mot allow the quantification of any effect of load impact heights (0.20 up to 0.80 m). There is correlation between load perception and GC (r =.72 and r=0.53, for S1 e S2, respectively), 1_75 (r = 0.74 and r = 0.83, for S1 and S2, respectively), AND Fy 1 (r = 0.56, and r = 0.62). These results show that P2 provides a better resolution for the relation between load perception and mechanical loads applied to locomotor system. As a conclusion, mechanical load intensity affects how quantify load perception.