Grip strength. (A) Effects of food restriction (FRC; food restricted controls), training (TR) and high repetition low force task (HRLF) performance on maximum grip strength (grams, g) in young and aged rats. (B) Graph showing results of Pearson's correlation tests between grip strength and serum cytokines in aged rats. Mean + SEM shown. ap < 0.05 compared to same age of NC rats; bp < 0.05 compared to same age of FRC rats.