Operose

op·er·ose (äp′ə rōs′)

adjective

1. done with or requiring much toil
2. very busy; industrious

Etymology: L operosus < opus (gen. operis), work: see opus

Example: I did some OPEROSE jogging and badminton sessions with Van and Nash in Marikina sports complex today. Equally OPEROSE are our efforts in remembering our high school days.