Phosphorylation of P70S6 Kinase in response to nutritional supplements following resistance exercise in older men. * = significantly different from pre exercise P < 0.001. The upper panel shows representative western blots for p70S6K phosphorylated at The389 and Total ERK 1&2. ERK 2 is used as a loading control. Data from the placebo (PLA) and 30 g whey group have been previously reported in reference 15.