Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Effects of High-Speed vs. Low-Speed Resistance Training on Neuromuscular and Functional Capacities in Institutionalized Older Adults: A Randomized Controlled Trial

Version 1 : Received: 8 July 2024 / Approved: 9 July 2024 / Online: 9 July 2024 (13:32:44 CEST)

How to cite: Magtouf, E.; Peyrot, N.; Cherni, Y.; Gaeid Chortane, O.; Jolibois, J.; Rahmani, A.; Maktouf, W. Effects of High-Speed vs. Low-Speed Resistance Training on Neuromuscular and Functional Capacities in Institutionalized Older Adults: A Randomized Controlled Trial. Preprints 2024, 2024070762. https://doi.org/10.20944/preprints202407.0762.v1 Magtouf, E.; Peyrot, N.; Cherni, Y.; Gaeid Chortane, O.; Jolibois, J.; Rahmani, A.; Maktouf, W. Effects of High-Speed vs. Low-Speed Resistance Training on Neuromuscular and Functional Capacities in Institutionalized Older Adults: A Randomized Controlled Trial. Preprints 2024, 2024070762. https://doi.org/10.20944/preprints202407.0762.v1

Abstract

Objectives: To compare the effects of high-velocity resistance training to slow-velocity re-sistance training on neuromuscular and functional parameters and to analyze the relationship between changes in walking speed and improvements in neuromuscular parameters following intervetions. Methods: 40 participants were randomly assigned to either a high-speed resistance training group (GHS, n = 18; age = 80.41 ± 10.12 years; BMI = 23.81 ± 3.45 kg/m²) or a low-speed resistance training group (GLS, n = 22; age = 82.89 ± 5.32 years; BMI = 23.81 ± 3.45 kg/m²). Before and after the interventions, gait speed (m/s) was assessed using a 10-minute walking test, and relative maximal force (Relative F max, N/kg) was evaluated during maximal voluntary isometric con-traction of the plantar flexors. From the force-time curve, early (0 – 50 ms) and late (100 – 200 ms) rates of force development (RFD) were extracted from the linear slopes (Δ force / Δ time). Results: Gait speed significantly improved in both groups (p < 0.05). However, the improvement was more pronounced in the GHS compared to the GLS (p < 0.05). Relative Fmax showed a more significant increase in the GLS than in the GHS (p < 0.05). Moreover, a significant 10% increase in early RFD in the GLS and a 20.1% increase in the GHS were observed (p < 0.05). The improvement in early RFD was greater in the GHS (p < 0.05). Additionally, late RFD improved significantly only in the GHS (+20.4%, p < 0.05). Conclusion: High-velocity resistance training appears particularly effective in improving the ability to rapidly generate force, which is essential for many daily activities re-quiring explosive movements and quick responses.

Keywords

Gait; Force; Seniors; Resistance training; Functional capacities; Power; Explosiveness

Subject

Public Health and Healthcare, Physical Therapy, Sports Therapy and Rehabilitation

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