Of course, you can! That's the beauty of Dr. Sarno's discovery. It covers all situation, because the subconscious mind can reduce blood flow at any time: before, during, and after exercise. Here's a paragraph from the FAQ section of my book that may help in such situations:
"Q: So how do I know whether my back pain is due to an injury or is from tension?
A: If any of the following conditions exist, you probably have TMS:
1. The pain persists or recurs or both, despite rest and various treatments.
2. The pain has no clear cause or can be attributed only to a physical incident that happened a while back, such as lifting an object two weeks earlier.
3. The pain is attributed to a routine activity, such as driving, sitting too long, mowing the lawn, or playing golf.
4. The pain pattern matches TMS: You hurt or have more pain at night, first thing in the morning, or on weekends. The pain moves around from your back to your leg or your shoulder. You should also watch for pain that comes long after an activity or at the end of the workday.
[1]
5. The pain is sharp, not the dull muscle ache you get from too much work or exercise.
6. Numbness is intermittent. It gets better or worse and moves around.
7. There is no change in color or swelling in the “injured” area. Our bodies are made to respond immediately to a serious injury. Can you see an actual swelling or change in color in the injured area? If not, the pain could very well be TMS.
Since my recovery I have been injured several times while sparring in my karate class or in other incidents, and I have found that two or three days of rest is about what I need to recover from the initial injury. After that I test my ability to walk or work and push back against the pain until I have recovered completely. I remember once, two weeks after I had recovered from being kicked in the arms repeatedly during sparring, I woke one night in pain. I could not determine why, but I knew it had to be due to either tension or conditioning. I quickly eliminated the pain and went back to sleep."
So if it is the same exercise routine as always and no significant increase in your workout, it is most likely TMS.