{'fraction_non_alphanumeric': 0.039729501267962805, 'fraction_numerical': 0.030431107354184278, 'mean_word_length': 4.775609756097561, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Stretching and Muscle Injury: A Review

There were significant differences in basketball and soccer injury rates between the trained and the other two groups, and the untrained group had a significantly higher injury incidence than that of the untrained male control group. The difference between the trained and untrained groups was found to be significant only when noncontact injuries were considered (P= 0.05). The authors note that the study included more volleyball players in the trained group, and that participants were not randomly assigned to trained or untrained groups. These facts may have biased the trained group toward a lower injury rate. (10), the trained and male control groups had the fewest (2 each). The knee injury incidence per 1,000 athlete-exposures was significantly different among groups (0.43 in untrained girls, 0.12 in trained girls, and 0.09 in males; P = 0.02). Between-group differences in noncontact knee injury rates were also significant. Rates were 0.35 for untrained, 0 for trained, and 0.05 for controls (P = 0.005). The difference in the incidence of noncontact injuries between the two female groups was also significant (?=0.01). COMMENT