WordNet sense 1 (imparting vitality and energy):

bracing, fresh, refreshing, tonic, energising, energizing, refreshful

WordNet sense 2 (imparting strength and vitality):

invigorating

WordNet sense 3 (quick and energetic):

lively, merry, rattling, snappy, spanking, zippy

WordNet sense 4 (possessing or exerting or displaying energy):

energetic

WordNet sense 5 (become brisk):

brisken, brisk up

WordNet sense 6 (full of activity or engaged in continuous activity):

active