Table 2.

Summary of Adverse Event and Dropout Reporting in Clinical Trials of Therapeutic Exercise (N = 113)^a

Category	Number (%)
Total number of subjects in exercise arm	5909
Studies with a clear statement of AEs	50 (44)
Studies that reported exercise-related AEs occurring among those subjects who were allocated to exercise	24 (21.2)
Studies that reported exercisers experiencing an AE NOT related to exercise (among those with statement about AEs)	5 (12.5)
Total number of exercisers in studies that had a clear statement of AEs	2856
Number of exercisers who had an exercise-related AE in exercise study arms that had a clear statement about AEs	297 (10.4)
Number of exercisers who had an AE NOT related to exercise in studies that had a clear statement about AEs	58 (2.0)
Studies with a clear statement of DOs	103 (91.2)
Studies that reported DOs among studies that had a clear statement of DOs	76 (73.9)
Studies in which reasons for DOs could be considered AEs (eg, back pain, knee pain, neck pain, leg pain, wrist pain)   among all studies that had a statement of DOs	16 (15.5)
Total number of exercisers in studies that had a clear statement of DOs	5562
Number of exercisers who dropped out where DO reason could be considered an AE among all exercisers in studies that   reported DOs	39 (0.7)
Number of exercisers who dropped out where DO reason was not considered harm	605 (10.9)
Total number of exercisers in studies that had a statement of AEs or a statement about DOs	5579
Number of exercisers who dropped out where reasons for DO could be interpreted as an exercise-related AE plus total   number of exercise-related AEs reported	336 (6.0)

^a AE = adverse event; DO = dropout.