The purpose of this study was to compare sprint test performance performed by football players of different ages and levels of competition. One hundred and forty six Portuguese players from different teams completed the test (seven maximal sprints interspersed with 25 s active recovery). A 6 (level of competition: 1(st) national division, 2(nd) national division, 1(st) regional division, sub 16...

heart produces and secretes a hormone called atrial natriuretic peptide. the aim of this research was to investigate the effect of eight weeks of resistance and sprint training on anp of non-athlete men. 36 non-athlete healthy men were randomly divided into three groups (12 subjects each group): resistance (mean age ± sd: 33.1±2.9 years), sprint (mean age ± sd:  32.1±2.5 years) and control (mea...

The coexpression in H2O2-stress conditions The expression data were obtained from Causton et al.[1]. Six arrays in H2O2-stress conditions (including 0m, 10m, 20m, 40m 60m and 120m, 0m is YPD condition) were used in our analysis. The logarithmic ratio of expression between 10m (or 20m, 40m, 60m, and 120m) and 0m were normalized to 0 mean and standard deviation of 1. Coexpression of gene pairs wa...

This study examined the contribution of phosphocreatine (PCr) and aerobic metabolism during repeated bouts of sprint exercise. Eight male subjects performed two cycle ergometer sprints separated by 4 min of recovery during two separate main trials. Sprint 1 lasted 30 s during both main trials, whereas sprint 2 lasted either 10 or 30 s. Muscle biopsies were obtained at rest, immediately after th...

The aims of the present study were to compare the effects of 1) training at 90 and 100% sprint velocity and 2) supervised versus unsupervised sprint training on soccer-specific physical performance in junior soccer players. Young, male soccer players (17 ± 1 yr, 71 ± 10 kg, 180 ± 6 cm) were randomly assigned to four different treatment conditions over a 7-week intervention period. A control gro...

The present study examined the growth hormone (GH) response to repeated bouts of maximal sprint cycling and the effect of cycling at different pedaling rates on postexercise serum GH concentrations. Ten male subjects completed two 30-s sprints, separated by 1 h of passive recovery on two occasions, against an applied resistance equal to 7.5% (fast trial) and 10% (slow trial) of their body mass,...