Abstract
Resisted sprint training (RST) affects sprint speed in the acceleration phase, but there is no research regarding this for in adolescents. This study investigated the effects of RST on sprint speed and ground reaction force (GRF) in high school baseball players. Subjects were assigned to the resisted sprint group (RSG, n=10, loading 20% body mass), or the normal sprint group (NSG, n=9, without loading) and trained three days per week for eight weeks. Sprint speed [0-5, 5-10, 10-15, 15-20 and 0-20 meters (m)] and GRF [peak propulsive/resultant force, (PFpro/ PFres); impulse, (I); and ratio of force applied onto the ground (RF)] measured at the right and left foot at the start, the first step of the left foot (L1st), 5 m and 10m were assessed before and after training. In the RSG, a significant interaction was found for sprint speed at 0-5 m (p=0.028) and increased after training (p<0.0001). The 15-20 m sprint speed increased significantly in the NSG after training (p=0.022). The 0-20 m sprint speed increased significantly in both groups after training (RSG, p=0.001; NSG, p=0.041). Significant interactions were found for PFpro (p=0.015) and RF (p=0.0002) at the L1st in the RSG. PFpro (p=0.005), PFres (p=0.038) and RF (p=0.0002) at L1st increased significantly in the RSG. RST increased sprint speed in the early part of the acceleration phase by improving force production but prevented the improvement of sprint speed over 15 m. Combining RST and sprint training without loading improved sprint speed in the acceleration phase.
Highlights
Sprinting is an essential component of baseball and is the only physical factor used for both offense and defense [1, 2]
A significant interaction was noted for the 0-5 m sprint speed, and it was significantly increased in the RSG after training
Spinks et al reported that 0-5 m sprint speed increased by 9.1% for soccer and rugby football players following resisted sprint training for eight weeks with a load of 13% body mass [11]
Summary
Sprinting is an essential component of baseball and is the only physical factor used for both offense and defense [1, 2]. Sprint distances in baseball are often less than 30 m and are considered to be similar to the initial acceleration phase (0-10 m) or acceleration phase (0-30 m) of a 100 m sprint [4,5,6]. Sprint speed in the acceleration phase is required in many field sports, including baseball. The particular importance of speed in the first few steps of a field sports game was examined [6]. It was found that sprint speed after starting and in the acceleration phase are very important for baseball. Sprint training with resistance-adding equipment (tire, harness, or weight vest) is one of the best methods for developing the early phase of acceleration [5]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
