Spurgeon was pro-exercise as well - get out and do something today, it will serve your joy and satisfaction in God:

“Sedentary habits have a tendency to create despondency. To sit alone in one posture pouring over a book or driving a quill (he lived 150 years ago), is in itself a taxing of nature. But add to this a badly ventilated chamber, a body that has long been without exercise, a heart burdened with many cares and we have all the elements of creating a seething cauldron of despair, especially in the months of fog. He who forgets the humming of the bees among the heather, the cooing of the wood pigeons in the forests, the songbirds in the forest, the rippling of rills among the rushes the sighing of the wind among the pines - needs not wonder if his heart forgets to sing and his soul grows heavy.

A days breathing of fresh air upon the hills or a few hours ramble in the beech woods’ calm would sweep the cobwebs of our brains away and the toiling ministers that are but half alive would have life. A mouthful of sea air or a stiff walk in the wind’s face would not give grace to the soul, but it would yield oxygen to the body, which is the next best thing. The firs, the rabbits, the streams, the trouts, the fir trees, the squirrels, the primroses, the violets, the farmyard, the new mown hay, the fragrant hops – these are the best medicine for hypochondriacs, the surest tonics for the declining, the best refreshments for the weary, for lack of opportunity or inclination, these great remedies are neglected and the student becomes a self-immolated victim.”

C.H. Spurgeon, from Piper’s message “How to Fight for Joy”