American Journal of Sports Science

Volume 4, Issue 5, September 2016

  • Biomechanical Indicators of Jump Height Among Varied Techniques of Vertical Jump

    Abdel-Rahman Ibrahim Akl, Mohamed Mohamed Doma

    Issue: Volume 4, Issue 5, September 2016
    Pages: 77-83
    Received: Jul. 29, 2016
    Accepted: Aug. 05, 2016
    Published: Aug. 21, 2016
    Abstract: The purpose of the present study was to determine the biomechanical indicators of jump height among varied techniques of vertical jump and examine if the rate of force development is a valid indicator for vertical jump height or not. Fifteen male high level athletes participated in this study performed three techniques of the vertical jump. Motion ... Show More
  • Quantitative Analysis of Penalty Kicks and Yellow Card Referee Decisions in Soccer

    Jimmy Tanamati Soares, Lior Shamir

    Issue: Volume 4, Issue 5, September 2016
    Pages: 84-89
    Received: Aug. 01, 2016
    Accepted: Aug. 15, 2016
    Published: Aug. 29, 2016
    Abstract: Soccer referees are required to make instant decisions during the game under non-optimal conditions such as imperfect view of the incident and substantial pressure from the crowd, the teams, and the media. Some of the decisions can be subjective, such as a yellow card decision after a foul is called, where different referees might make different de... Show More
  • Effects of Resisted Sprint Training on Sprint Performance in High School Baseball Players

    Yuta Sekine, Junichi Okada

    Issue: Volume 4, Issue 5, September 2016
    Pages: 90-97
    Received: Aug. 04, 2016
    Accepted: Aug. 19, 2016
    Published: Sep. 07, 2016
    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),... Show More