Conclusions Our results demonstrate that the existence of a relationship between training load and injury continues to be well supported in the literature and is strongest for subjective internal training load .
The directionality of this relationship appears to depend on the type and timeframe of load measured
Background The relationship between training load and musculoskeletal injury is a rapidly advancing area of research in need of an up date d systematic review .
Association of Injury History and Incident Injury in Cadet Basic Military Training.
PURPOSE This study aim ed to determine the association between injury history at enrollment and incident lower extremity ( LE ) injury during cadet basic training among first-year military cadets . METHODS Medically treated LE injuries during cadet basic training documented in the Defense Medical Surveillance System were ascertained in a prospect i ve cohort study of three large US military academies from 2005 to 2008 . Both acute injuries ( International Classification of Disease , Ninth Revision , codes in the 800 - 900s , including fracture , dislocations , and sprains/strains ) and injury-related musculoskeletal injuries ( International Classification of Disease , Ninth Revision , codes in the 700s , including inflammation and pain , joint derangement , stress fracture , sprain/strain/rupture , and dislocation ) were included . Risk ratio ( RR ) and 95 % confidence interval ( CI ) were computed using multivariate log-binomial models stratified by gender . RESULTS During basic training , there were 1438 medically treated acute and 1719 musculoskeletal-related LE injuries in the 9811 cadets . The most frequent LE injuries were sprains/strains ( 73.6 % of acute injuries ) and inflammation and pain ( 89.6 % of musculoskeletal-related injuries ) . The overall risk of incident LE injury was 23.2 % ( 95 % CI = 22.3%-24.0 % ) . Cadets with a history of LE injury were at increased risk for incident LE injury . This association was identical in males ( RR = 1.74 , 95 % CI = 1.55 - 1.94 ) and females ( RR = 1.74 , 95 % CI = 1.52 - 1.99 ) . In site-specific analyses , strong associations between injury history and incident injury were observed for hip , knee ligament , stress fracture , and ankle sprain . Injury risk was greater ( P < 0.01 ) for females ( 39.1 % ) compared with males ( 18.0 % ) . The elevated injury risk in females ( RR = 2.19 , 95 % CI = 2.04 - 2.36 ) was independent of injury history ( adjusted RR = 2.09 , 95 % CI = 1.95 - 2.24 ) . CONCLUSION Injury history upon entry to the military is associated with the incidence of LE injuries sustained during cadet basic training . Prevention programs targeted at modifiable factors in cadets with a history of LE injury should be considered
Conclusions Our results demonstrate that the existence of a relationship between training load and injury continues to be well supported in the literature and is strongest for subjective internal training load .
The directionality of this relationship appears to depend on the type and timeframe of load measured
Background The relationship between training load and musculoskeletal injury is a rapidly advancing area of research in need of an up date d systematic review .