Examinando por Autor "Alacid, Fernando"

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    Acute Fatigue Impairs Heart Rate Variability and Resting Muscle Oxygen Consumption Kinetics
    (Multidisciplinary Digital Publishing Institute (MDPI), 2024-10) Vasquez-Bonilla, Aldo A.; Yáñez-Sepúlveda, Rodrigo; Tuesta, Marcelo; Martin, Eduardo Báez-San; Monsalves-Álvarez, Matías; Olivares-Arancibia, Jorge; Duclos-Bastías, Daniel; Recabarren-Dueñas, Catalina; Alacid, Fernando
    Featured Application: Importantly, measurements obtained through VOT-NIRS can vary significantly post-exercise, which should be considered by researchers before application. This study evaluated the influence of acute fatigue on heart rate variability (HRV) and muscle oxygen saturation (SmO2) at rest, as well as the reliability of SmO2 data measured using near-infrared spectroscopy (NIRS) during a vascular occlusion test (VOT). Twelve physically active subjects participated. Measurements included perceived muscle soreness using the visual analog scale (VAS pain), HRV parameters, variables of resting SmO2 (desaturation and resaturation), and reoxygenation kinetics (mean response time, MRT) through a VOT-NIRS located in the vastus lateralis (VL). Measurements were taken at three points: 24 h before, before exhaustive exercise, and 30 min after exhaustive exercise. The results indicated that acute fatigue increased resting muscle oxygen consumption in desaturation (+22 SmO2) and resaturation (+18 SmO2), improved MRT (−15 s), and elevated sympathetic nervous system (SNS) activity, as observed in the R-R interval (−262 ms) and SNS index (+0.5). HRV significantly influenced desaturation (r2 = 0.69), resaturation (r2 = 0.60), and MRT (r2 = 0.54). Reliability was established with an ICC of 0.49 and 0.63 for desaturation and resaturation, respectively. Real changes in desaturation and resaturation should be considered ≥ 7% SmO2 at rest and ≥ 11% SmO2 to avoid daily fatigue interference. In conclusion, acute fatigue increases resting SmO2 consumption and is associated with higher SNS activity and increased VAS pain.
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    Personalised Nutritional Plan and Resistance Exercise Program to Improve Health Parameters in Celiac Women
    (MDPI, 2022-10) Martínez Rodríguez, Alejandro; Loaiza Martínez, Daniela Alejandra; Sánchez Sánchez, Javier; Rubio Arias, Jacobo Á.; Alacid, Fernando; Prats Moya, Soledad; Martínez Olcina, María; Yáñez Sepúlveda, Rodrigo; Marcos Pardo, Pablo J.
    Celiac disease (CD) is a permanent immune reaction to gluten in those with a genetic predisposition. This study was designed to evaluate menopause-associated symptoms, mood, bone quality, and IgA antibody levels in women with CD, untreated and treated with a gluten-free diet (GFD), and with or without resistance exercise. The randomised controlled trial was conducted on 28 Spanish women (>40 years old). Participants were divided into the following intervention groups: personalised gluten-free nutrition plan + exercise (GFD + E); personalised gluten-free nutrition plan (GFD); celiac controls (NO-GFD); and non-celiac controls (CONTROL). The participants responded to the Menopause Rating Scale and the Profile of Mood States (POMS) questionnaires. Bone quality was measured with ultrasound and IgA with a blood test. After 12 weeks of intervention, the GFD + E group showed significant improvement in urogenital symptoms and scored higher on the ‘vigour’ subscale of the POMS. Negative associations were found between the total score on the Menopause Rating Scale and the ‘vigour’ subscale of the POMS questionnaire. Only those women who underwent a personalised GFD nutritional intervention combined with resistance exercise demonstrated significant changes after the intervention. © 2022 by the authors.