BackgroundNo previous research has analysed kinetic fatigue of elite adult players and elite youth players during the competitive period.ObjectivesThe aim of the present study was to analyse kinetic post-match fatigue in professional and youth soccer players during the competitive period.Materials and Methodsresting heart rate (HRrest), post-effort recovery heart rate (HRrecovery), rate of perceived exertion fatigue (RPEf), muscle soreness and blood samples with creatine kinase (CK) and resting lactate (La) from nine professional soccer players were measured immediately before, 24 hour and 48 hour after two official French first league matches (Ligue 1) whereas RPEf, HRrest, and 20m speed performance (speed-20 m) were measured in ten U-17 elite players immediately before, 24 hour and 48h after a friendly match.Resultsfor professionals, a soccer match elevated all physiological markers during the next 24 hours (P < 0.05); only HRrecovery remained significantly different 48 hours after the match (P < 0.05) whereas there was no variation of HRrest, RPEf, and speed-20m, which were elevated until 24h and got back to reference values 48 hours after the match (P < 0.05) for the U17 players. Comparing the two groups, HRrest results remained lower all the time for professionals, and RPEf was lower for U-17, 24 hours after the match (P < 0.05).ConclusionsIndependent of their level, professional soccer players, need 48 hours to recover after an official match. Professionals gain more fatigue than young players after a match, but recover as fast. Thus, they recover more efficiently especially due to a better physical condition and fitness training. It is expected that the results showed in the study help elite soccer and fitness coaches to manage the training load of the team according to the match.

La determinación de Vitamina C o ácido ascórbico en el suero es utilizada para el diagnóstico de los estados de déficit serio en el aporte alimenticio, que trae consigo el escorbuto.

En esta oportunidad, presentamos el trabajo realizado en la ciudad de Tarapoto, de gran influencia en el desarrollo de la región oriental del Perú y en donde se centralizan las labores de la llamada “Carretera Marginal", que unirá de Norte a Sur una serie de lugares poblados y que, luego, con las carreteras de penetración a la sierra y costa, asegurará un medio de comunicación que les permitirá salir del aislamiento en que viven y el desarrollo de las actividades agro-pecuarios en la extensa zona de la selva alta. En esta forma se podrá disponer de tierras para albergar cientos de miles de campesinos que viven en condiciones infrahumanas en la sierra y costa sobrepoblada del país.

Las seroproteínas se presentan con cifras constantes en los sujetos bien nutridos y de buena salud; de ahí que su concentración sea un índice de su estado nutricional y traduce al mismo tiempo la calidad y cantidad de proteínas ingeridas en la alimentación, ya que, ante la deficiencia de este aporte se suceden una serie de procesos clínicos que culminan, principalmente, en la detención del crecimiento, y en casos severos en la presencia del Kwashiorkor en los niños de poca edad.