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. 2024 Mar 25;12(4):89.
doi: 10.3390/sports12040089.

Does Obesity Affect the Rate of Force Development in Plantar Flexor Muscles among Older Adults?

Hamza Ferhi  1 , Elmoetez Magtouf  1 , Ahmed Attia  1 , Sylvain Durand  2 , Sébastien Boyas  2 , Bruno Beaune  2 , Sabri Gaied Chortane  1 , Wael Maktouf  3
Affiliations

Does Obesity Affect the Rate of Force Development in Plantar Flexor Muscles among Older Adults?

Hamza Ferhi et al. Sports (Basel). .

Abstract

The literature offers limited information on the effect of obesity on the rate of force development (RFD), a critical parameter for mobility in older adults. The objectives of this study were to explore the influence of obesity on the RFD in older adults and to examine the association between this neuromuscular parameter and walking speed. The participants (42 older adults) were classified into two groups: the control group (CG, n = 22; mean age = 81.13 ± 4.02 years; body mass index (BMI) = 25.13 ± 3.35 kg/m2), and the obese group (OG, n = 20; mean age = 77.71 ± 2.95 years; BMI = 34.46 ± 3.25 kg/m2). Walking speed (m/s) was measured using the 10 m walking test. Neuromuscular parameters of the plantar flexors were evaluated during a maximal voluntary contraction test using a dynamometer. The RFD was calculated from the linear slop of the force-time curve in the following two phases: from the onset of the contraction to 50 ms (RFD0-50) and from 100 to 200 ms (RFD100-200). The gait speed was lower in the OG compared to the CG (p < 0.001). The RFD50/100 and RFD100/200 were lower in the OG compared to the CG (p < 0.001). The RFD50/100 was found to be the predominant influencer on gait speed in the OG. In conclusion, obesity negatively impacts the RFD in older adults and RFD stands out as the primary factor among the studied parameters influencing gait speed.

Keywords: explosive force; overweight; triceps surae; walking.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Study design.
Figure 2
Figure 2
Force–time curve from force onset to 200 ms during maximal voluntary contraction of plantar flexors.
Figure 3
Figure 3
Comparison of gait speed between groups. OG—older adults with obesity; CG—control group; *** p < 0.001.
Figure 4
Figure 4
(A) Relationship between RFD0–50 and gait speed. (B) Relationship between RFD100–200 and gait speed.
See this image and copyright information in PMC

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References

    1. Olmos A.A., Stratton M.T., Ha P.L., Dalton B.E., VanDusseldorp T.A., Mangine G.T., Feito Y., Poisal M.J., Jones J.A., Smith T.M., et al. Early and Late Rapid Torque Characteristics and Select Physiological Correlates in Middle-Aged and Older Males. PLoS ONE. 2020;15:e0231907. doi: 10.1371/journal.pone.0231907. - DOI - PMC - PubMed
    1. Aagaard P., Simonsen E.B., Andersen J.L., Magnusson P., Dyhre-Poulsen P. Neural Adaptation to Resistance Training: Changes in Evoked V-Wave and H-Reflex Responses. J. Appl. Physiol. 2002;92:2309–2318. doi: 10.1152/japplphysiol.01185.2001. - DOI - PubMed
    1. Gerstner G.R., Thompson B.J., Rosenberg J.G., Sobolewski E.J., Scharville M.J., Ryan E.D. Neural and Muscular Contributions to the Age-Related Reductions in Rapid Strength. Med. Sci. Sports Exerc. 2017;49:1331–1339. doi: 10.1249/MSS.0000000000001231. - DOI - PubMed
    1. Hester G.M., Ha P.L., Dalton B.E., Vandusseldorp T.A., Olmos A.A., Stratton M.T., Bailly A.R., Vroman T.M. Rate of Force Development as a Predictor of Mobility in Community-Dwelling Older Adults. J. Geriatr. Phys. Ther. 2021;44:74–81. doi: 10.1519/JPT.0000000000000258. - DOI - PubMed
    1. Thompson B.J., Ryan E.D., Herda T.J., Costa P.B., Herda A.A., Cramer J.T. Age-Related Changes in the Rate of Muscle Activation and Rapid Force Characteristics. Age. 2014;36:839–849. doi: 10.1007/s11357-013-9605-0. - DOI - PMC - PubMed

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