Dorsey Kelly (heronswan0)

Similar increases were observed between groups in leg-press 1RM (LEU 19.0 ± 9.4% and PLA 21.0 ± 10.4%, p=0.31) and mCSA (LEU 8.0 ± 5.6% and PLA 8.4 ± 5.1%, p=0.77). CONCLUSION high-dose leucine supplementation did not enhance gains in muscle strength and mass after a 12-week resistance training program in young resistance-trained males consuming adequate amounts of dietary protein.PURPOSE An inverse association between physical activity (PA) and risk of coronary heart disease has been seen in many studies, but evidence for benefits of PA after myocardial infarction (MI) in reducing mortality is limited. METHODS Using data from the Health Professionals Follow-up Study cohort, we followed male survivors of MI. Short term and long term changes in PA from before to after MI were calculated, and participants without ambulation impairment were classified into maintained low, decreased, increased, or maintained high PA categories. Cox models were used to estimate hazard ratios (HR) and 95% confidence intervals (CI) for mortality across PA and PA change categories. RESULTS During a mean of 14 years of follow-up of 1651 incident non-fatal MI cases, we documented 678 deaths, 307 were due to CVD. Adjusted HRs for all-cause mortality comparing ≥ 21 with ≤ 1.5 METs/week of PA before MI was 0.73; (95% CI, 0.59-0.89; Ptrend=0.03). Compared with men who maintained low PA before and after MI, men who maintained high PA had a 39% (95% CI, 25-50) lower risk of all-cause mortality, and those who had a long-term increase in PA from before to after MI had a 27% (95% CI, 6-43) lower risk. Walking for ≥ 30 minutes/day after MI was associated with a 29% lower mortality (HR=0.71; 95% CI, 0.58-0.84), independent of walking pace, and walking pace after MI was inversely associated with mortality (HR=0.67; 95% CI, 0.49-0.92). CONCLUSIONS Maintaining a high PA or having a long-term increase in PA from before to after MI was associated with lower mortality among male MI survivors. Walking time and walking pace after MI were each inversely associated with mortality.INTRODUCTION Human skeletal muscle is thought to have heightened sensitivity to exercise stimulus when it has been previously trained (i.e., it possesses "muscle memory"). We investigated whether basal and acute resistance exercise-induced gene expression and cell signaling events are influenced by previous strength training history. METHODS Accordingly, 19 training naïve women and men completed 10 weeks of unilateral leg strength training, followed by 20 weeks of detraining. Subsequently, an acute resistance exercise session was performed for both legs, with vastus lateralis biopsies taken at rest and 1 h after exercise in both legs (memory and control). SB525334 supplier RESULTS The phosphorylation of AMPK and eEF2 was higher in the memory leg than in the control leg at both time points. Post-exercise phosphorylation of 4E-BP1 was higher in the memory leg than in the control leg. The memory leg had lower basal mRNA levels of total PGC1α, and, unlike the control leg, exhibited increases in PGC1α-ex1a transcripts after exercise. In the genes related to myogenesis (SETD3, MYOD1, and MYOG), mRNA levels differed between the memory and the untrained leg; these effects were evident primarily in the male subjects. Expression of the novel gene SPRYD7 was lower in the memory leg at rest and decreased after exercise only in the control leg, but SPRYD7 protein levels were higher in the memory leg. CONCLUSION In conclusion, several key regulatory genes and proteins involved in muscular adaptations to resistance exercise are influenced by previous training history. Although the relevance and mechanistic explanation for these findings need further investigation, they support the view of a molecular muscle memory in response to training.INTRODUCTION Athletes returning to sport after anterior cruciate ligament reconstruction (ACLR) demonstrate prolonged changes in landing kinematics, kinetics and muscle activ