Percorrer por autor "Monteiro, Cristina P."
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- Association between whey protein, regional fat mass, and strength in resistance-trained men: a cross-sectional studyPublication . Batista, Ana; Monteiro, Cristina P.; Borrego, Rute; Matias, Catarina N.; Teixeira, Filipe J.; Valamatos, Maria J.; Oliveira, Ana C.; Reis, Joana F.; Mendes, Lino; Sardinha, Luís B.The purpose of this study was to evaluate the association between whey protein supplementation, body composition, and muscle strength in resistance-trained individuals. Forty-nine healthy males, aged 18 to 35 years and were engaged in resistance training for at least 1 year, were assigned into 2 groups according to whey protein intake (whey - n = 26, age: 30.7 ± 7.4 years, body mass: 75.8 ± 9.0 kg; without whey: n = 23, age: 31.0 ± 7.4 years, body mass: 77.9 ± 9.3 kg). Using a cross-sectional design, a morning assessment of body fat mass (FM) (by dual-energy X-ray absorptiometry) and strength (using 1-repetition maximum for bench press and back squat) was performed. Nutritional assessment was performed by 3-day food records. Regarding nutritional habits, differences between total energy intake (kcal) and estimated energy requirements (kcal) were observed. Results, from raw data or controlling for energy intake, estimated energy requirements, or achieved percentage of energy requirements, showed that whey protein supplementation was inversely correlated with whole-body FM (R = -0.367 (p = 0.010); R = -0.317 (p = 0.049); R = -0.380 (p = 0.011); R = -0.321 (p = 0.047), respectively), trunk FM (R = -0.396 (p = 0.005), R = -0.367 (p = 0.022), R = -0.423 (p = 0.004), R = -0.369 (p = 0.021), respectively) and android FM (R = -0.381 (p = 0.007), R = -0.332 (p = 0.039), R = -0.383 (p = 0.010), R = -0.336 (p = 0.036), respectively). No correlations were found between muscle strength outcomes and whey protein supplementation. The present data suggest that whey protein ingestion has a positive association with whole-body and regional (trunk and android) FM.
- Magnesium, insulin resistance and body composition in healthy postmenopausal womenPublication . Laires, Maria J.; Moreira, Helena; Monteiro, Cristina P.; Sardinha, Luís; Limão, F.; Veiga, Luísa; Gonçalves, Alice; Ferreira, A.; Bicho, ManuelObjective: This study was conducted to determine the association between magnesium (Mg), body composition and insulin resistance in 136 sedentary postmenopausal women, 50 to 77 years of age. Methods: Diabetics, hypertensives and women on hormonal replacement therapy were excluded and the remaining 74 were divided according to BMI≥25 (obese: OG) and BMI<25 kg/m2 (non-obese: NOG). Nutritional data disclosed that intakes were high for protein and saturated fat, low for carbohydrates, polyunsaturated fat and Mg and normal for the other nutrients, according to recommended dietary allowances (RDA). Mg values in red blood cells (RBC-Mg) and plasma (P-Mg), were determined, as were fasting glucose, and insulin levels, Homeostasis Model Assessment (HOMA), body mass index (BMI), body fat percent (BF %), abdominal fat (AF) and free fat mass (FFM). Results: RBC-Mg values were low in both groups when compared with normal values. There were significant differences in body composition parameters, HOMA and insulin levels, with higher basal insulin levels in OG. RBC-Mg was directly correlated with insulin, HOMA and FFM in both groups, according to Pearson correlations. HOMA in OG was also directly correlated with BMI, FFM and AF. In NOG, HOMA was only correlated with FFM. The low RBC-Mg levels observed were probably due to low Mg intake and to deregulation of factors that control Mg homeostasis during menopause. Conclusions: Both Mg deficit and obesity may independently lead to a higher risk for insulin resistance and cardiovascular disease.
- The association between whey protein, regional fat mass, and strength in resistance-trained men: a cross-sectional studyPublication . Batista, Ana; Monteiro, Cristina P.; Borrego, Rute; Matias, Catarina N.; Teixeira, Filipe J.; Valamatos, Maria J.; Oliveira, Ana C.; Reis, Joana F.; Mendes, Lino; Sardinha, Luís B.The purpose of this study was to evaluate the association between whey protein supplementation, body composition and muscle strength, in resistance-trained individuals. Forty-nine healthy males, aged 18 to 35 years that were engaged in resistance training for at least one year, were assigned into two groups according to whey protein intake (Whey: n=26, 30.7 ± 7.4 yr, 75.8 ± 9.0 kg; WithoutWhey: n=23, 31.0 ± 7.4 yr, 77.9 ± 9.3 kg). Using a cross-sectional design, a morning assessment of body fat mass (FM) (by dual energy X-ray absorptiometry) and strength (using 1RM for bench press and back squat) was performed. Nutritional assessment was performed by 3-day food records. Regarding nutritional habits, differences between total energy intake (kcal) and estimated energy requirements (kcal) were observed. Results, from both raw data or controlling for energy intake, estimated energy requirements or achieved percentage of energy requirements, showed that whey protein supplementation was inversely correlated with whole-body FM (R=-0.367 (p=0.010); R=-0.317 (p=0.049); R=-0.380 (p=0.011); R=-0.321 (p=0.047), respectively), trunk FM (R=-0.396 (p=0.005), R=-0.367 (p=0.022), R=-0.423 (p=0.004), R=-0.369 (p=0.021), respectively) and android FM (R=-0.381 (p=0.007), R=-0.332 (p=0.039), R=-0.383 (p=0.010), R=-0.336 (p=0.036), respectively). No correlations were found between muscle strength outcomes and whey protein supplementation. The present data suggests that whey protein ingestion has a positive association with whole-body and regional (trunk and android) FM.