The Effects of Static and Dynamic Stretching on Local Dynamic Stability of Lower Extremity Joint's Angular Displacement in Active Males during Cycling

The previous studies on the effect of statics and dynamics stretching on forthcoming performance have reported various results. The purpose of the present study was to examine the effects of static and dynamic stretching types of muscles on local dynamic stability in angular displacement of the lower extremity joints in active males during cycling using innovative nonlinear analysis methods.
A total of 15 male university students of physical education and sport sciences at Kharazmi University voluntarily participated in the current study. Participants referred to the laboratory twice on two days seperated by a 48-hour interval, and the lower extremity kinematics data was collected from 30 pedaling cycles on the stationary cycle in 70 RPM in conditions of of without stretching, and 2, 5, and 10 minutes after stretching by means of motion analysis camera in 50 Hz frequency. The angular displacement of hip, knee, and ankle joints were extracted by constructing time series and Lyapunov Exponent (LyE) calculation.
The results of repeated measure ANOVA did not show any significant differences in angular displacement LyE in hip, knee, and ankle joints 2, 5, and 10 minutes post stretching (P>0.05).
Considering the results, both static and dynamic stretching types can be used in warm up programs before pedaling on stationary cycle for the pruposes of training or rehabilitation.