Purpose: To determine if any kinematic differences exist between two common sprint drills (A- and B-drills) and maximal sprinting. Methods: 12 collegiate sprinters (19.17±1.11 y/o) granted informed consent were filmed performing two 40-meter sprints, A-skips, and B-skips. Three-dimensional motion analysis tracked the coordinates of 24 reflective markers and resulting joint kinematics were computed. Results: Statistical analysis revealed that sprinting yielded a significantly lower maximum hip flexion (p=0.015) but a significantly higher minimum ankle angular velocity (p=0.012) and step rate (p=0.000) value than A-drills. When compared to B-drills, sprinting values were significantly lower in maximum hip flexion (p=0.047), minimum knee flexion (p=0.043), and maximum hip angular velocity (p=0.006), but significantly higher in minimum ankle angular velocity (p=0.018) and step rate (p=0.000). Experienced sprinters had a significantly greater maximum plantar-flexion in sprinting (p=0.031) and minimum knee flexion in A-drills (p=0.030) than inexperienced sprinters. Inexperienced sprinters had a significantly greater plantar-flexion in A-drills (p=0.026) and B-drills (p=0.046), B-drill maximum knee flexion (p=0.016), maximum ankle angular velocity (p=0.024), and minimum knee angular velocity (p=0.048) than experienced sprinters. Conclusion: Since several kinematic differences exist between two common sprint drills as compared to maximal sprinting, efficacy of their uses is questioned.
Cappadona, Julianne, "Kinematic and Spatiotemporal Analysis Between Sprint Drills and Maximal Sprinting" (2013). PTHMS Undergraduate Publications. 1.