What is the fine-grained topic of the following text: STUDY DESIGN: Pre-test, post-test study of the relationship between exercise-related changes in feeling states and pain among persons with chronic incomplete spinal cord injury (SCI) who performed three separate exercise sessions consisting of body-weight supported treadmill training (BWSTT). Only return the topic.
The relationship between exercise-related changes in feeling states and pain among persons with chronic incomplete spinal cord injury (SCI) during body-weight supported treadmill training.