Izvorni znanstveni članak

https://doi.org/10.69589/hsv.41.1.4

Inter‑individual variability in strength adaptations to a 12‑week standardized resistance‑training program: A pilot study

Haris Amedovski ; University St. Kliment Ohridski Bitola, Higher Medical School - Bitola, Department of Physiotherapy
Denis Arsovski ; University St. Kliment Ohridski Bitola, Higher Medical School - Bitola, Department of Physiotherapy
Armin Amedovski ; Clinic Hospital Dr. Trifun Panovski Bitola, Partizanska BB, Department of Orthopedics and Traumatology

Sažetak

Inter-individual variability in adaptations to resistance training is a well-documented and expected phenomenon, particularly in previously untrained individuals. Consequently, the present investigation was conceived as a pilot study, with the primary aim of characterizing the magnitude and pattern of individual strength responses under tightly standardized training and nutritional conditions. Five healthy adults with no previous exposure to structured resistance training - three males and two females from 25 to 30 years with an average body mass index of 25 participated in this research. The training program consisted of four weekly sessions with an upper/lower body split, performed on commercial machines and free weights. All sessions were supervised by the same researcher to minimize execution-related variability. Additionally, all participants adhered to a eucaloric diet with a standardized protein intake (1.8 g/kg body mass) to reduce potential nutritional confounding. Muscular strength was assessed with six-repetition maximum (6RM) testing across 11 exercises at baseline and after 12 weeks of training. As anticipated, all participants exhibited meaningful increases in strength; however, the magnitude of these improvements differed substantially between individuals. Notably, inter-individual variability was most pronounced in single-joint isolation exercises, whereas compound lowerbody movements demonstrated more homogeneous strength gains across participants. As a pilot investigation, the present results provide a detailed descriptive foundation for future studies aiming to explore mechanistic determinants of individual responsiveness using larger samples and inferential designs.

Ključne riječi

inter-individual variability, resistance training, muscular strength, training adaptations, six-repetition maximum (6RM), isolation and compound exercises

Hrčak ID:

348758

URI

https://hrcak.srce.hr/348758

Datum izdavanja:

30.6.2026.

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