Dataset - The Influence of Plyometric and Combined Training on Speed, Agility, Lower-Limb Force and Power in Female Volleyball Players: The Role of Peak Height Velocity

Description The dataset is part of the research project "The Influence of Plyometric and Combined Training on Speed, Agility, Lower-Limb Force and Power in Female Volleyball Players: The Role of Peak Height Velocity". It contains the results of atropometric measurements and fitness tests. Methodology Subjects: 99 female volleyball players from pro clubs in Poland, who were divided according to their biological age (Pre-PHV or Post-PHV) and then according to the intervention undertaken (Plyo group, Combo group, Con group).Measurements Anthropometry: Stature and sitting height were measured with a Tanita HR-001 stadiometer (0.1 cm accuracy). Body composition (mass, fat %, muscle mass, TBW) was assessed via bioelectrical impedance using a Tanita T6360 analyzer. Biological Maturity: Maturity offset was calculated using the Mirwald equation for females: $$Maturity \ offset \ (years) = -9.376 + (0.0001882 \times [leg \ length \times sitting \ height]) + (0.0022 \times [age \times leg \ length]) - (0.005841 \times [age \times sitting \ height]) - (0.002658 \times [age \times body \ mass]) + (0.07693 \times [body \ mass/stature \ ratio \times 100])$$ Participants were classified as pre-PHV (offset ≤ -0.3 years) or post-PHV (offset ≥ 0.3 years). Testing Protocol: Assessments were conducted pre- and post-intervention in a fixed sequence: anthropometry, 20m sprint, T-test, and CMJ. Each session followed a standardized RAMP warm-up. Best trials were used for analysis with 2–5 minute rest periods between efforts to minimize fatigue. Sprint Performance: 20-meter sprint times were recorded (0.01 s accuracy) using Witty System (Microgate) electronic timing gates placed 30 cm from the starting line at chest height. Change-of-Direction: Agility was assessed via the T-test (forward sprint, lateral shuffle, and back-pedal), with times recorded to the nearest 0.01 s. Jump Mechanics: CMJ height, rebound force, and power output (absolute and relative) were measured using dual CQStab 2P Sport dynamometric platforms (CQ Elektronik System). Jumps were performed with hands on hips and self-selected squat depth to isolate lower-limb explosive power. Dataset Structure & Variable Definitions The database was created using Statistica 13.3 (TIBCO Software Inc.). The dataset consists of 38 variables describing physical characteristics, body composition, and athletic performance of female volleyball players. Measurements were taken at two time points (pre-test _1 and post-test _2). General Information: No. / Person code: Participant identification. Group: Study arms: Plyo: Plyometric training intervention. Combo: Combined plyometric and resistance training intervention. Con: Control group (regular volleyball training only). PHV status: Maturity status (Pre- or Post- Peak Height Velocity). Sex: Participant gender (F – Female). Age [y]: Chronological age in years. Body Composition & Growth: Body mass [kg]: Total body weight. Fat [%]: Body fat percentage. Muscle mass [kg]: Skeletal muscle mass. TBW [%]: Total Body Water percentage. PHV [y]: Estimated age at Peak Height Velocity. Maturity offset [y]: Time (in years) from/to the predicted PHV. Performance Metrics: 20m [s]: 20-meter sprint time (speed test). T-test [s]: Agility T-test completion time. CMJ [cm]: Countermovement Jump height. CMJ rebound force [N]: Ground reaction force during the rebound phase. CMJ PPO [W]: Peak Power Output during jump. CMJ Relative PO [W/kg]: Relative Power Output (normalized to body mass). Derived Calculations: Suffix _1: Baseline measurement (pre-intervention). Suffix _2: Follow-up measurement (post-intervention). Delta (Columns 29–38): Calculated difference between the second and first measurement (_2 minus _1).