[{"_id":"6083801e4b59bb38eeb9f232","sets":4,"reps":"4-6","name":"deadlift","description":null,"instructions":["keep feet sholder width apart","use legs first and then move to lower back"]}]

db.collection.update({"_id":"6083801e4b59bb38eeb9f232"},{$set:{"description":["Second day - Legs 2"],"instructions":["More reps, less weight","keep feet shoulder-width apart","use legs first and then move to lower back","Keep at least 2 reps in the tank"],"reps":"6-8","sets":4,"addNew":true}})