RT info:eu-repo/semantics/article T1 Power-oriented resistance training combined with high-intensity interval training in pre-frail and frail older people: comparison between traditional and cluster training set configurations on the force–velocity relationship, physical function and frailty A1 Baltasar Fernández, Iván A1 Alcazar, Julian A1 Martín Braojos, Susana A1 Ara, Ignacio A1 Alegre, Luis M. A1 García García, Francisco José A1 Alfaro Acha, Ana A1 Losa Reyna, José K1 Muscle power K1 Cluster training K1 Resistance training K1 High-intensity interval training K1 Intra-set rest K1 2411 Fisiología Humana AB Objectives To analyse the force–velocity relationship changes in response to two different training programmes differing inthe set configuration (cluster vs. traditional), and their impact on physical function and frailty in pre-frail and frail older adults.Methods 43 pre-frail and frail (Frailty Phenotype ≥ 1 criteria) older adults (81.4 ± 5.1 years) participated in this study. Par-ticipants were assigned to cluster (CT; n = 10; 10-s intra-set rest), traditional (TT; n = 13; no intra-set rest) or control (CON;n = 20) groups. Force–velocity relationship (F0, V0 and Pmax), physical function (Short Physical Performance Battery, SPPB)and frailty (Frailty Phenotype, FP) were assessed at baseline and after the training programme.Results Both CT and TT groups showed similar improvements in P max after training (CT = + 36.7 ± 34.2 W;TT = + 33.8 ± 44.6 W; both p < 0.01). V0 was improved by both CT (+ 0.08 ± 0.06 m s−1; p < 0.01), and TT (+ 0.07 ± 0.15 m s−1,p > 0.05). F 0 remained unchanged in CT (+ 68.6 ± 224.2 N, p > 0.05) but increased in TT (+ 125.4 ± 226.8 N, p < 0.05).Finally, SPPB improved in both training conditions (CT = + 2.3 ± 1.3 points; TT = + 3.0 ± 1.2 points; both p < 0.05) and inthe CON group (+ 0.9 ± 1.4 points, p < 0.05). CT and TT reduced their FP (CT = − 1.1 criteria; TT = − 1.6 criteria; bothp < 0.01), while no changes were observed in the CON group (− 0.2 criteria, p = 0.38).Conclusions Both training methods were equally effective for improving P max , physical function and reducing frailty in pre-frail and frail older people. TT may be effective for improving both force and velocity parameters, while CT may be effectivefor improving velocity parameters alone, although further research is required to confirm these findings. PB Springer SN 1439-6319 YR 2023 FD 2023 LK https://uvadoc.uva.es/handle/10324/61635 UL https://uvadoc.uva.es/handle/10324/61635 LA eng NO European Journal of Applied Physiology, 2023. NO Producción Científica DS UVaDOC RD 17-jul-2024