# Analysis of the Influence of the Angular Position of the Clean in Kinematics and Kinetics
###### Abstract  
Objective: The aims that we set in this study were to analyse the kinematic and kinetic changes in the lower limbs of cyclists when using the utility model, n\({}^{\text{o}}\) of publication ES 1078023, which consists of a system of cleats with an exact omnidirectional adjustment and without oscillations between the shoe and the pedal. Methods: This is a quasi-experimental, longitudinal and prospective study with a non-randomized sampling. The sample was made up of 34 cyclists. The variables studies focused on the kinematics of each joint of the lower limb in three planes and the kinetics in the function of the angular position of the cleat. They had the Bioval(r) system put in place, through which the kinematic parameters were recorded at the points marked on the lower limb for 20 s. Three systems were used for the kinetics (Power Tap, Rotor and Pioneer), recording the power developed for 1 min for each of the study situations. Results: Regarding the kinematic variables, statistically significant differences were found for the three planes in all of the structures studied. As for the kinetics, statistically significant differences were also observed, both when analyzing them globally and when doing so for each of the systems. Conclusions: The variation in the rotational position of the cleat influences both the cyclist's kinematics and dynamics. b acycling; cleat pedal; biomechanics Article Analysis of the Influence of the Angular Position of the Clean in Kinematics and Kinetics  
[PERSON], [PERSON], J. Performance in professional cyclists depends on a large number of factors, which is why, in the last decade, several studies have focused on the adjustment of the bicycle from both the kinematic and kinetic point of pedaling [1; 2]. However, there is no agreement regarding the optimal configuration of the position on the bicycle. Likewise, there is much skepticism about the application of forces on the pedal (mechanical efficiency) being a useful indicator of pedaling efficiency [1]. [PERSON] et al. [7] examined the movement of the frontal plane in cyclists with and without problems at the knee level. The symptoms improved by reorienting this plane in movement. In cycling, cyclical loads causing injuries can be due to a misalignment between the cyclist and the bicycle. The foot is restricted by the pedal to a circular pattern in the sagittal plane and this union allows small or zero movements between the sole of the shoe and the pedal in the frontal and transverse planes [12]. [PERSON] et al. [13] showed that the foot-ankle complex underwent movements associated with the loads applied to the pedal. If these movements are controlled at the level of this joint, the contractile forces are more optimally developed [14]. These associated loads are the result of the anatomical contractions of the articular structures and of the tridimensional orientation of their axes, these being determined by the orientation of the foot [15]. Therefore, the forces required for propulsion will be transmitted through the articulations of the lower limb. The pedal has been an element about which little has been researched, and it has been ignored in many investigations. It has three main adjustments, that is to say, anterior-posterior, latero-medial and rotation. For both the first adjustment and the second, research has been developed to determine to what degree they influence the cyclist's performance [16; 17; 18]. However, with respect to the rotational adjustment, few investigations have been carried out [19]. It is necessary to conduct new research for a better knowledge of the union between the orientation of the forces applied to the pedal and the changes in muscular efficiency, given that this knowledge is limited [20]. It has been demonstrated that one of the factors that influences the application of forces generated by the lower limb on the pedal is the longitudinal adjustment of the cleat, but nothing is known about that influence on the rotational adjustment.