José Manuel Mesa

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Creatine is the object of growing interest in the scientific literature. This is because of the widespread use of creatine by athletes, on the one hand, and to some promising results regarding its therapeutic potential in neuromuscular disease on the other. In fact, since the late 1900s, many studies have examined the effects of creatine supplementation on(More)
OBJECTIVE To determine whether physical activity, sedentary activities, and/or cardiorespiratory fitness are related to waist circumference in adolescents, as previously reported in adults. RESEARCH METHODS AND PROCEDURES The study subjects were a representative sample of Spanish adolescents (N = 2859; 1357 boys, 1502 girls; age, 13 to 18.5 years), all of(More)
This study investigates which position (grip span) on the standard grip dynamometer results in maximum grip strength. Our null hypotheses included (1) no optimal grip span exists for measuring grip strength and (2) optimal grip span is unrelated to hand size. We also intended to derive a simple mathematical algorithm to adapt grip span to hand size. Seventy(More)
This study aimed at investigating to what extent sauna-induced dehydration is effective to rapidly decrease body weight and whether this practice alters strength and/or explosive power (jump capacity) in healthy athletes. We also investigated whether the observed changes could be rapidly reversed through rehydration. Six male (aged 21.6 +/- 1.8 y) and six(More)
In spite of all the advances in sport nutrition and the importance of an adequate food intake in order to improve sport performance, both recreational and professional athletes forget frequently to include planning an optimum diet and fluid intake in their global strategy for performance. Physiological and metabolic adaptations produced as a consequence of(More)
BACKGROUND AND AIMS We explored the associations between aerobic physical fitness with blood lipids and a composite index of blood lipids and fasting glycaemia in adolescents, analysing possible interactions with weight status. METHODS AND RESULTS Body mass index and aerobic physical fitness was measured in 2090 adolescents (1034 males and 1056 females)(More)
BACKGROUND/AIMS To explore in adolescents the associations between simple anthropometric variables with a continuously distributed summary score for lipid-related metabolic risk in both overweight and non-overweight adolescents, and to test whether these associations are modified by the level of cardiorespiratory fitness. METHODS Cardiorespiratory(More)
INTRODUCTION AND OBJECTIVES To determine whether the level of physical activity or physical fitness (i.e., aerobic capacity and muscle strength) in Spanish adolescents influences lipid and metabolic profiles. METHODS From a total of 2859 Spanish adolescents (age 13.0-18.5 years) taking part in the AVENA (Alimentación y Valoración del Estado Nutricional en(More)
AIM To describe the effects of chronological age and biological age (pubertal development) on serum lipid and lipoprotein levels, body mass index (BMI) and waist circumference in Spanish adolescents. METHODS A representative Spanish sample of 526 adolescents (254 males and 272 females), were studied. Total cholesterol (TC), high density lipoprotein(More)
OBJECTIVES To study the effect of different types of sports on plasma lipid profile. Subjects and method. Fasting plasma levels of total, LDL- and HDL-cholesterol (TC, LDLc, HDLc), triglycerides, phospholipids, apo A-I, apo B-100, and Lp(a) were measured in 28 swimmers, 17 volleyball players and 23 soccer players, and in a control group. All subjects(More)