Examinando por Autor "Galdames Maliqueo, Sergio"

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    Ítem
    Effects of a Low Dose of Orally Administered Creatine Monohydrate on Post-Fatigue Muscle Power in Young Soccer Players
    (Nutrients, 2024-04-28) Huerta Ojeda, Álvaro; Jofré-Saldía, Emilio; Torres-Banduc, Maximiliano; Galdames Maliqueo, Sergio; Barahona-Fuentes, Guillermo; Cofré Acevedo, Carlos; Lizana Romero, Gabriela; de Villa Garduño, Regina; Riquelme Vera, Gerardo; Vera Paredes, Pablo; Barrios Ávalos, Benjamín; Morales Serey, Tatiane; Yeomans-Cabrera, María-Mercedes; Jorquera-Aguilera, Carlos
    The use of creatine monohydrate (Cr) in professional soccer is widely documented. However, the effect of low doses of Cr on the physical performance of young soccer players is unknown. This study determined the effect of a low dose of orally administered Cr on muscle power after acute intra-session fatigue in young soccer players. Twenty-eight young soccer players (mean age = 17.1 ± 0.9 years) were randomly assigned to either a Cr (n = 14, 0.3 g·kg-1·day-1 for 14 days) or placebo group (n = 14), using a two-group matched, double-blind, placebo-controlled design. Before and after supplementation, participants performed 21 repetitions of 30 m (fatigue induction), and then, to measure muscle power, they performed four repetitions in half back squat (HBS) at 65% of 1RM. Statistical analysis included a two-factor ANOVA (p ˂ 0.05). Bar velocity at HBS, time: p = 0.0006, ŋp2 = 0.22; group: p = 0.0431, ŋp2 = 0.12, time × group p = 0.0744, ŋp2 = 0.02. Power at HBS, time: p = 0.0006, ŋp2 = 0.12; group: p = 0.16, ŋp2 = 0.06, time × group: p = 0.17, ŋp2 = 0.009. At the end of the study, it was found that, after the induction of acute intra-session fatigue, a low dose of Cr administered orally increases muscle power in young soccer players.
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    Ítem
    Relationship between Asymmetries and Functional Autonomy in Older Chilean Adults
    (MDPI, 2022-11) Huerta Ojeda, Álvaro; Toro Zepeda, Vanieska; Jofré Saldía, Emilio; Bravo, Maximiliano; Parra, Carol; Campos Armijo, Gaspar; Jorquera Aguilera, Carlos; Albornoz Hernández, Makarena; Yeomans Cabrera, María Mercedes; Galdames Maliqueo, Sergio
    The objectives of this study were: (a) to determine asymmetries, both lower limb (LL) and upper limb (UL), in Chilean older adults, and (b) to relate asymmetries to FA in both LL and UL. Forty-one older adults voluntarily participated in this study (mean ± standard deviation [SD]: age 72.0 ± 8.0 years, LL asymmetries 13.78 ± 14.87%, UL asymmetries 10.70 ± 8.85%, FA 40.35 ± 16.26 points). The variables were: (1) asymmetries of LL and UL, assessed through a force platform and handgrip, respectively; (2) FA, assessed through the Latin American Group for Maturity (GDLAM) and the GDLAM index of autonomy (GI) protocol. The relationship between the variables was performed through Spearman’s correlation. The analysis showed that 39% of the participants presented asymmetries above 15% in the LL. Likewise, this 39% of older adults presented a lower FA than their peers with asymmetries below 15% in the LL (≤15%: 35.64 ± 12.26 points vs. >15%: 47.69 ± 19.23 points, p = 0.003). The analysis showed a small correlation between LL and GI asymmetries (r = 0.27, p = 0.07) and a small but negative correlation between UL and GI (r = −0.21). The mean values of asymmetries of both LL and UL are within ‘normal’ parameters. However, several older adults were identified as being at risk. In parallel, older adults who presented a higher level of asymmetries in LL showed a lower level of FA. © 2022 by the authors.