Circuit training is a powerful method for using weights or other short burst exercises to train your anaerobic and aerobic systems (sorry exercise physiologists if I am misrepresenting the nature of circuit training, it is not my field).
When I do circuits, I do a burst of push ups, followed by planks or crunches, followed by several minutes on the bike, followed by squats, and finally rows with a band. Then, I repeat, with only very little rest in between circuits. It is an amazing way of training the body.
You can do the same thing with your writing for change of pace. This can be a valuable way of getting you unstuck, and in helping you get out of a rut.
So, try this circuit one day this week. Use a timer so you don't have to pay attention to the time.
1) Read an article relevant to your work for five minutes
2) Write in your article for five
3) Free write for five
4) Rest for five
Repeat three times, for a total of an hour.
DON'T feel you need to do this exercise if you are in an excellent writing grove. Save such experiments for when you have some extra time, or when you are trying to experiment with some new ideas.