Relationship between some anthropometric, biomechanics and motor abilities on reactive strength for volleyball players

Research aim:
Determining how physical, biomechanical and anthropometric traits that affect volleyball players'
abilities to reactive strength:
1. The relationship between some anthropometric traits and the reactive strength when landing from a box between 30 and 50 cm height .
2. The relationship between some motor abilities and biomechanical variables relating to the reactive strength when landing from a box between 30 and 50 cm height.
Research questions:
1. Is there a correlation between anthropometric factors and reactive strength when player lands from a 30 cm and 50 cm box height?
2. Is there a correlation between motor abilities and biomechanical variables on reactive strength when landing from a 30 cm and 50 cm box height?
Research procedures:
Research Methodology:
Descriptive method.
Research areas:
Domain spatial: Alexandria's Delphi Volleyball Club Hall.
Temporal domain: The study was conducted during the 2020–2021 training season, and the period of time covered by this investigation spanned from Sunday, January 3, 2020, through Sunday, January 10, 2020.
Subjects: volleyball player at Delphi Club, which competes in the Egyptian Premier League, 24 players were intentionally chosen from the first team.