JUAN PABLO REY LOPEZ
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- EFFECTS OF EIGHT MONTHS OF WHOLE-BODY VIBRATION TRAINING ON THE MUSCLE MASS AND FUNCTIONAL CAPACITY OF ELDERLY WOMEN(2015) SANTIN-MEDEIROS, Fernanda; REY-LOPEZ, Juan P.; SANTOS-LOZANO, Alejandro; CRISTI-MONTERO, Carlos S.; VALLEJO, Nuria GaratacheaSantin-Medeiros, F, Rey-Lopez, JP, Santos-Lozano A, Cristi-Montero, CS, and Garatachea Vallejo, N. Effects of eight months of whole-body vibration training on the muscle mass and functional capacity of elderly women. J Strength Cond Res 29(7): 1863-1869, 2015Few intervention studies have used whole-body vibration (WBV) training in the elderly, and there is inconclusive evidence about its health benefits. We examined the effect of 8 months of WBV training on muscle mass and functional capacity in elderly women. A total of 37 women (aged 82.4 +/- 5.7 years) voluntarily participated in this study. Subjects were randomly assigned to a vibration group (n = 19) or a control group (n = 18). The vibration group trained on a vertical vibration platform twice a week. The control group was requested not to change their habitual lifestyle. The quadriceps femoris muscle cross-sectional area was determined by magnetic resonance imaging. All participants were evaluated by a battery of tests (Senior Fitness Test) to determine their functional capacity, as well as handgrip strength and balance/gait. General linear repeated-measure analysis of variance (group by time) was performed to examine the effect of the intervention on the outcomes variables. After 8 months, nonstatistically significant differences in the quadriceps CSA (pre-training: 8,516.16 +/- 1,271.78 mm(2) and post-training: 8,671.63 +/- 1,389.03 mm(2)) (p > 0.05) were found in the WBV group (Cohen's d: -0.12), whereas the CON group significantly decreased muscle mass (pre-training: 9,756.18 +/- 1,420.07 mm(2) and post-training: 9,326.82 +/- 1,577.53 mm(2)), with moderate effect size evident (Cohen's d: 0.29). In both groups, no changes were observed in the functional capacity, handgrip strength and balance/gait. The WBV training could prevent the loss of quadriceps CSA in elderly women.
- Independent and Combined Effects of Physical Activity and Sedentary Behavior on Blood Pressure in Adolescents: Gender Differences in Two Cross-Sectional Studies(2013) MORAES, Augusto Cesar Ferreira de; CARVALHO, Heraclito Barbosa; REY-LOPEZ, Juan Pablo; GRACIA-MARCO, Luis; BEGHIN, Laurent; KAFATOS, Anthony; JIMENEZ-PAVON, David; MOLNAR, Denes; HENAUW, Stefaan De; MANIOS, Yannis; WIDHALM, Kurt; RUIZ, Jonatan R.; ORTEGA, Francisco B.; SJOSTROM, Michael; POLITO, Angela; PEDRERO-CHAMIZO, Raquel; MARCOS, Ascension; GOTTRAND, Frederic; MORENO, Luis A.Objectives: To examine the independent and combined association of physical activity (PA) and sedentary behavior (SB) on both systolic (SBP) and diastolic blood pressure (DBP) in adolescents from two observational studies. Methods: Participants from two cross-sectional studies, one conducted in Europe (n = 3,308; HELENA study) and the other in Brazil (n = 991; BRACAH study), were selected by complex sampling. Systolic and diastolic blood pressure (outcomes), PA and SB, both independently and combined, and potential confounders were analyzed. Associations were examined by multilevel linear regression. Results: Performing the recommended amount of PA (>= 60 min/d) attenuated the effect of SB on DBP in BRACAH study girls and in boys from both studies. In contrast, PA did not attenuate the effects of SB on the SBP of girls in the HELENA study. The combination of less than recommended levels of PA with 2-4 h/d of sedentary behavior was found to be associated with increased SBP in boys from both studies. Conclusions: Meeting current PA recommendations could mediate the association between SB and DBP in both sexes. In boys, the joint effect of low levels of PA and excessive sedentary activity increases SBP levels. Longitudinal studies are required to confirm these findings.
- Sedentary behaviours and its association with bone mass in adolescents: the HELENA cross-sectional study(2012) GRACIA-MARCO, Luis; REY-LOPEZ, Juan P.; SANTALIESTRA-PASIAS, Alba M.; JIMENEZ-PAVON, David; DIAZ, Ligia E.; MORENO, Luis A.; VICENTE-RODRIGUEZ, GermanBackground: We aimed to examine whether time spent on different sedentary behaviours is associated with bone mineral content (BMC) in adolescents, after controlling for relevant confounders such as lean mass and objectively measured physical activity (PA), and if so, whether extra-curricular participation in osteogenic sports could have a role in this association. Methods: Participants were 359 Spanish adolescents (12.5-17.5 yr, 178 boys,) from the HELENA-CSS (2006-07). Relationships of sedentary behaviours with bone variables were analysed by linear regression. The prevalence of low BMC (at least 1SD below the mean) and time spent on sedentary behaviours according to extracurricular sport participation was analysed by Chi-square tests. Results: In boys, the use of internet for non-study was negatively associated with whole body BMC after adjustment for lean mass and moderate to vigorous PA (MVPA). In girls, the time spent studying was negatively associated with femoral neck BMC. Additional adjustment for lean mass slightly reduced the negative association between time spent studying and femoral neck BMC. The additional adjustment for MVPA did not change the results at this site. The percentage of girls having low femoral neck BMC was significantly smaller in those participating in osteogenic sports (>= 3 h/week) than in the rest, independently of the cut-off selected for the time spent studying. Conclusions: The use of internet for non-study (in boys) and the time spent studying (in girls) are negatively associated with whole body and femoral neck BMC, respectively. In addition, at least 3 h/week of extra-curricular osteogenic sports may help to counteract the negative association of time spent studying on bone health in girls.