Hebrews 12:11

χαρᾶς. “A matter of joy”; the gen. of a property, or perhaps of the sphere to which a thing belongs. Winer, p. 244.

ὕστερον δὲ κ.τ.λ. The original is expressed in the emphatic and oratorical style of the writer, “but afterwards it yieldeth a peaceful fruit to those who have been exercised by it—(the fruit) of righteousness.” He means that though the sterner aspect of training is never pleasurable for the time, it results in righteousness—in moral hardihood and serene self-mastery—to all who have been trained in these gymnasia (γεγυμνασμένοις). See Romans 5:2-5.