Comparative effects of suspension-based and dynamometer-based isometric training on neuromuscular performance in trained male athletes: a randomized comparative study.
4 affiliations
- 1Department of Sport Management, Faculty of Sport Sciences, Gaziantep University, Gaziantep, Türkiye.
- 2Department of Coaching Education, Faculty of Sport Sciences, Gaziantep University, Gaziantep, Türkiye.
- 3Department of Coaching Education, Faculty of Sport Sciences, Inönü University, Malatya, Türkiye.
- 4Department of Physical Education and Sport Teaching, Faculty of Sport Sciences, Düzce University, Düzce, Türkiye.
Abstract
Objectives
Isometric strength training is widely used to enhance athletic performance and support rehabilitation. However, few studies compare the effects of dynamometer-based and suspension-based isometric training on performance, and the effects of these methods remain unclear. This study compares the effects of dynamometer-based and suspension-based isometric training on muscle asymmetry, balance, estimated maximal strength, anaerobic power, and isokinetic strength in trained male athletes.Methods
This study included 16 healthy male athletes aged 18 to 21 years (mean age: 18.81 ± 1.16 years; height: 178.06 ± 4.65 cm; body weight: 74.25 ± 4.32 kg; BMI: 23.43 ± 1.24 kg/m²; body fat: 14.29 ± 1.55%). Participants were randomly assigned to either the TRX-based isometric training group (TRG, n=8) or the dynamometer-based isometric training group (DTG, n=8). Both groups performed isometric strength training based on the principle of progressive overload for eight weeks. The TRG group completed a predetermined series of four exercises three days per week. In contrast, the DTG group performed 6-second isometric contraction series in both flexion and extension positions for each leg three days per week. We assessed data normality using the Shapiro-Wilk test and calculated the mean and standard deviation. The relationship between pre-test and post-test measurements in the TRG and DTG groups was analyzed using a two-way repeated-measures analysis of variance (ANOVA; time × group); the level of statistical significance was set at p <.05.Results
A significant main effect of time from the pretest to the posttest was found for the parameters of isokinetic peak torque, OSI, MLI, peak power, average power, and estimated 1RM (p <.05). In contrast, no significant main effect of time was observed for muscle asymmetry, API, and time to reach peak power (p>.05). Furthermore, it was stated that neither the group effect nor the time × group interaction showed a statistically significant effect on any of the performance parameters (p>.05).Conclusion
In conclusion, while an eight-week TRX and dynamometer-based isometric training program resulted in significant changes in selected strength, balance, and anaerobic power parameters attributable to the main effect of time, no significant changes were observed in group effects or time × group interactions for any of the measured parameters.
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BibTeX
@article{demiryol2026comparative,
title = {{Comparative effects of suspension-based and dynamometer-based isometric training on neuromuscular performance in trained male athletes: a randomized comparative study.}},
author = {Mete Berk Demiryol and Mehmet Vural and Faruk Akçınar and Kadir Tiryaki and Fırat Akcan},
journal = {Frontiers in physiology},
year = {2026},
month = oct,
doi = {10.3389/fphys.2026.1959307},
url = {https://europepmc.org/article/MED/42903089},
note = {CC BY},
}
RIS
TY - JOUR
TI - Comparative effects of suspension-based and dynamometer-based isometric training on neuromuscular performance in trained male athletes: a randomized comparative study.
AU - Mete Berk Demiryol
AU - Mehmet Vural
AU - Faruk Akçınar
AU - Kadir Tiryaki
AU - Fırat Akcan
PY - 2026
DA - 2026/10/06
JO - Frontiers in physiology
DO - 10.3389/fphys.2026.1959307
UR - https://europepmc.org/article/MED/42903089
AB - Objectives Isometric strength training is widely used to enhance athletic performance and support rehabilitation. However, few studies compare the effects of dynamometer-based and suspension-based isometric training on performance, and the effects of these methods remain unclear. This study compares the effects of dynamometer-based and suspension-based isometric training on muscle asymmetry, balance, estimated maximal strength, anaerobic power, and isokinetic strength in trained male athletes.Methods This study included 16 healthy male athletes aged 18 to 21 years (mean age: 18.81 ± 1.16 years; height: 178.06 ± 4.65 cm; body weight: 74.25 ± 4.32 kg; BMI: 23.43 ± 1.24 kg/m²; body fat: 14.29 ± 1.55%). Participants were randomly assigned to either the TRX-based isometric training group (TRG, n=8) or the dynamometer-based isometric training group (DTG, n=8). Both groups performed isometric strength training based on the principle of progressive overload for eight weeks. The TRG group completed a predetermined series of four exercises three days per week. In contrast, the DTG group performed 6-second isometric contraction series in both flexion and extension positions for each leg three days per week. We assessed data normality using the Shapiro-Wilk test and calculated the mean and standard deviation. The relationship between pre-test and post-test measurements in the TRG and DTG groups was analyzed using a two-way repeated-measures analysis of variance (ANOVA; time × group); the level of statistical significance was set at p <.05.Results A significant main effect of time from the pretest to the posttest was found for the parameters of isokinetic peak torque, OSI, MLI, peak power, average power, and estimated 1RM (p <.05). In contrast, no significant main effect of time was observed for muscle asymmetry, API, and time to reach peak power (p>.05). Furthermore, it was stated that neither the group effect nor the time × group interaction showed a statistically significant effect on any of the performance parameters (p>.05).Conclusion In conclusion, while an eight-week TRX and dynamometer-based isometric training program resulted in significant changes in selected strength, balance, and anaerobic power parameters attributable to the main effect of time, no significant changes were observed in group effects or time × group interactions for any of the measured parameters.
SN - 1664-042X
ER -