Validity of a User-Friendly Spreadsheet Designed for an In-Depth Analysis of Countermovement Bipodal Jumps Delgado García, Gabriel Pérez Castilla, Alejandro Rojas Ruiz, Francisco Javier Navarro Marchal, Ismael Caballero-Villalta, Anabel Affordable solution Force plate Fundamental movement assessment Ground reaction force and vertical jump This study was supported by the Spanish Ministry of Education (FPU22/04211) by the project “SensorSportLab III” (High Council of Sports and Spanish Ministry of Culture and Sport) and by the Ministry of Science and Innovation (PID2023-151166OB-I00SRA) (State Research Agency). Supplementary Materials: The following supporting information can be downloaded at: https://www.mdpi.com/article/10.3390/app15031519/s1 Countermovement bipodal jumps (CMJs), are widely used for health and performance assessment, but the software required for such analyses is often costly. The study aim was to examine the validity of an Excel/VBA spreadsheet for comprehensive CMJ kinetic analysis. The outcomes have been informed from scientific literature, and the spreadsheet includes modules for data filtering and photogrammetric analysis. To evaluate its validity, 21 participants performed CMJs on a dual force platform system, and the primary outcomes were compared with those derived from prestigious software (MARS 4.0). When jump height was calculated based on take-off speed and flight time the Mean Absolute Errors were 1.79 and 0.69 cm and the minimal detectable changes (MCD) were 1.28 and 0.16 cm. For the propulsive impulse, the error was 5.5 N · s and the MCD was 5.41 N · s. The intraclass correlations were 0.932 (0.902–0.953), 0.984 (0.977–0.989), and 0.940 (0.914–0.959), respectively, demonstrating a strong relationship, and residuals exhibited homoscedasticity. Considering the variability reported in previous studies for intra- and inter-subject comparisons, these errors are minimal, highlighting the spreadsheet’s sensitivity. With its exhaustive analytical capabilities and customizable features, this template serves as a valuable tool for trainers, physiotherapists, and academic teaching settings. 2025-03-12T13:07:47Z 2025-03-12T13:07:47Z 2025-02-02 journal article Delgado-García, G.; Pérez-Castilla, A.; Rojas-Ruiz, F.J.; Navarro-Marchal, I.; Caballero- Villalta, A. Validity of a User-Friendly Spreadsheet Designed for an In-Depth Analysis of Countermovement Bipodal Jumps. Appl. Sci. 2025, 15, 1519. https://doi.org/10.3390/app15031519 https://hdl.handle.net/10481/103009 10.3390/app15031519 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional MDPI