Reliability of a Simple Novel Field Test for the Measurement of Plantar Flexor Muscle Strength

Majstorović, Nikola; Nešić, Goran; Grbić, Vladimir; Savić, Zoran; Zivkovic, M.; Aničić, Zdravko; Marković, Stefan; Dopsaj, Milivoj

doi:10.1590/1517-8692202127012019_0002

Cited by 3 publications

(1 citation statement)

References 18 publications

(28 reference statements)

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“…To measure body composition, a multi-channel multi-segment bioimpedance -InBody 720 (Biospace Co., Seoul, Korea) was used, following the procedure described earlier (Dopsaj et al, 2020a). The contractile muscle characteristics, including hand flexors for left and right arm (Hand Grip test -HGL and HGR, respectively), plantar flexors (Plantar Flexor test -IPF), leg extensors (Isometric Leg Extension test -ILE), and back extensors (Isometric Deadlift test -IDL), were assessed using standardized testing procedures and protocol described earlier (Jaric, 2002;Majstorovic et al, 2020Majstorovic et al, , 2021. All measurements were carried out at the Faculty of Sports and Physical Education, University of Belgrade, in the methodical research laboratory.…”

Section: Methodsmentioning

confidence: 99%

Different Body Partialization Procedures Considering Maximum Strength and Explosiveness: Factorial Analysis Approach

Dopsaj,

Zlatovic,

Vukadinovic

et al. 2024

Int. J. Morphol.

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The aim of this study was to determine the sensitivity of different methods of partialization, in terms of different body component indices in relation to indicators of strength and explosiveness. The research involved 187 subjects who were divided into two groups based on sex. This research consisted of measuring body composition characteristics by multichannel bioimpedance analysis (BIA) InBody 720, as well as contractile characteristics of different muscle groups with tenziometric Dinamometry method. Based on the results of the factor analysis we found that regardless of the sex the most sensitive variable for partialization of absolute body isometric strength variable (ABiS) is partialization by allometric scaling (0.964 for females and 0.947 for males explained factor variance). However, in the case of absolute body isometric explosiveness (ABiE), the results of this study have demonstrated that partialization relative to skeletal muscle mass according to the body longitudinality -skeletal muscle mass index (SMMI) is the methodological choice disregarding the sex (0.982 for females and 0.980 for males explained factor variance). The results of the study have shown that for the purpose of scaling the maximal strength relative to body composition, the allometric method can be considered as a choice, while for the partialization of maximal isometric explosiveness skeletal muscle mass index is the best choice insensitive of the sex.

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Section: Methodsmentioning

confidence: 99%

Different Body Partialization Procedures Considering Maximum Strength and Explosiveness: Factorial Analysis Approach

Dopsaj,

Zlatovic,

Vukadinovic

et al. 2024

Int. J. Morphol.

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Acute effects of vibration foam rolling on the explosive strength properties of the plantarflexors during maximal isometric contraction

Borisavljević

Kukić²,

Ćosić

et al. 2023

IES

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BACKGROUND: Foam roller with vibration is a recent development and its implementation has not yet been provided with a sufficient scientific justification. Information on whether an implementation of vibration foam rolling for self-massage before the powerful muscular activities is a good strategy is scarce. OBJECTIVE: Therefore, the aim of this study was to determine the acute effects of a single 15-s and 60-s vibrating foam rolling treatment on muscle contractile properties during maximal voluntary isometric contraction (MVIC). METHODS: Twenty healthy and recreationally active subjects participated in this study. During first visit, baseline characteristics were collected, while on the second and third visit they performed a 15-s and a 60-s vibration foam rolling treatment, respectively. Their maximal force (F)max and rate of force development (RFDmax) were assessed using the MVIC of plantarflexors. RESULTS: The RFDmax was negatively affected (p⩽ 0.05) after the 15-s treatment and 60-s treatment, staying reduced even after 10-min of recovery. No significant effects were observed for Fmax. CONCLUSIONS: When implementing vibration foam rolling, either as a pre-workout activity or as a pre-competition treatment, caution should be taken. Short duration treatment should be avoided for activities were RFDmax has a significant impact on performance.

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Reliability and differences between the classic and the impulse model of isometric testing in function of maximal and explosive strength: Pilot research

Dopsaj,

Klisarić,

Kapeleti

et al. 2022

Fizička kultura

Self Cite

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The evaluation of maximal and explosive strength with isometric testing has a significant role in scientific and training practice, from which can be drawn needed information about the segment of the physical state of athletes. The aim of this research was to examine the reliability of the impulse model of isometric testing and to determine the quantitative differences in maximal and explosive strength in accordance to the classic and the impulse model of isometric testing. The laboratory method with tensiometric dynamometry was applied. The research was conducted on a sample of 28 adult and physically active participants. Tests for plantar flexors (PF), right handgrip (HGR), and left handgrip (HGL) were implemented, and all participants had three attempts for each test. Four variables were measured: maximal strength - Fmax, maximal explosive strength - RFDmax, time for maximal strength exertion - tFmax, time for maximal explosive strength exertion - tRFDmax for both models of testing for each test, implementing a standardized testing procedure. Performed data analysis included descriptive and correlation statistics, and a t-test for determining differences for dependent samples. Statistically significant differences (p < 0.05) were found between Fmax,RFDmax, tFmax and tRFDmax in PF, HGR and HGL, except for tRFDmax between classic and impulse models of testing. Impulse model has excellent reliability (ICC = 0.909 - 0.989) for PF, HGR, and HGL tests. The initial results of this study implicate approval for correction of the isometric testing procedure in the next direction: for measuring maximal strength it is approved to use the classic model of isometric testing, while for measuring explosive strength it is approved to use the impulse model.

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Reliability of a Simple Novel Field Test for the Measurement of Plantar Flexor Muscle Strength

Cited by 3 publications

References 18 publications

Different Body Partialization Procedures Considering Maximum Strength and Explosiveness: Factorial Analysis Approach

Different Body Partialization Procedures Considering Maximum Strength and Explosiveness: Factorial Analysis Approach

Acute effects of vibration foam rolling on the explosive strength properties of the plantarflexors during maximal isometric contraction

Reliability and differences between the classic and the impulse model of isometric testing in function of maximal and explosive strength: Pilot research

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