{"id":56040,"date":"2022-10-24T21:29:56","date_gmt":"2022-10-24T21:29:56","guid":{"rendered":"https:\/\/one.sightlinemg.com\/militarytimes\/uncategorized\/2022\/10\/24\/what-new-injury-performance-data-tells-us-about-marine-boot-camp\/"},"modified":"2026-08-08T20:47:13","modified_gmt":"2026-08-08T20:47:13","slug":"what-new-injury-performance-data-tells-us-about-marine-boot-camp","status":"publish","type":"post","link":"https:\/\/one.sightlinemg.com\/militarytimes\/news\/2022\/10\/24\/what-new-injury-performance-data-tells-us-about-marine-boot-camp\/","title":{"rendered":"What new injury, performance data tells us about Marine boot camp"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A first-of-its kind study of Marine Corps boot camp shows different patterns in <a href=\"https:\/\/www.marinecorpstimes.com\/news\/your-marine-corps\/2018\/10\/11\/broken-feet-and-bruised-egos-male-marines-take-brunt-of-injuries-at-infantry-officer-course\/\" target=\"_blank\">musculoskeletal injury rates and training progression<\/a> for male and female troops. It also suggests possible training changes that might improve outcomes and lower drop rates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Marine Corps leaders, however, say they\u2019re still considering a way forward as they absorb study results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.marinecorpstimes.com\/news\/your-marine-corps\/2022\/10\/21\/marine-boot-camp-study-calls-for-mixed-gender-drill-instructor-teams\/\" target=\"_blank\">739-page study,<\/a> led by University of Pittsburgh\u2019s Warrior Human Performance Research Center, was commissioned by the Marine Corps in a $2 million contract in 2020.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Marine Corps was responding to a new congressional mandate to adopt a <a href=\"https:\/\/www.marinecorpstimes.com\/news\/your-marine-corps\/2022\/10\/11\/marine-drill-instructors-crude-sexual-marks-prompt-boot-camps-visit\/\" target=\"_blank\">g<\/a><a href=\"https:\/\/www.marinecorpstimes.com\/news\/your-marine-corps\/2022\/10\/11\/marine-drill-instructors-crude-sexual-marks-prompt-boot-camps-visit\/\" target=\"_blank\">ender-integrated training model at both of its recruit depots<\/a>, and the study largely focuses on interviews with recruits, new Marines and drill instructors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A vast trove of biometric data, however, collected from Polar Grit X watches, saliva samples and thorough tracking logs, provides unprecedented insights into the physical experience of recruits in the 13-week boot camp training cycle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The data also suggests fitness and training differences between male and female units that may lead to disparate outcomes.<\/p>\n\n\n\t<aside class=\"smg-interstitial-link wp-block-smg-interstitial-link\">\n\t\t<a href=\"https:\/\/one.sightlinemg.com\/marinecorpstimes\/news\/your-marine-corps\/2022\/10\/21\/marine-boot-camp-study-calls-for-mixed-gender-drill-instructor-teams\/\" class=\"smg-interstitial-link__inner\">\n\t\t\t\t\t\t\t<div class=\"smg-interstitial-link__media\">\n\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"175\" src=\"https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/2061266.jpg.jpg?w=300\" class=\"smg-interstitial-link__image wp-post-image\" alt=\"\" \/>\t\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"smg-interstitial-link__content\">\n\t\t\t\t<span class=\"smg-interstitial-link__kicker\">Related<\/span>\n\t\t\t\t<h3 class=\"smg-interstitial-link__title\">Marine boot camp study calls for mixed-gender drill instructor teams<\/h3>\n\t\t\t\t\t\t\t\t\t<p class=\"smg-interstitial-link__excerpt\">The model recommended would keep same-gender drill instructor teams with male and female platoons only for hygiene, sleeping and overnight duty.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/a>\n\t<\/aside>\n\t\n\n\n<p class=\"wp-block-paragraph\">Researchers collected injury data from Marine Corps Recruit Depot Parris Island, South Carolina, for a gender-integrated company, made of female and male platoons training together, and a series track consisting of male and female-only companies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Data from a male-only recruit company was collected from Marine Corps Recruit Depot San Diego, which had no female recruits until 2021.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Between male and female recruits, certain differences were dramatic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Among the 98 female recruits in the series track, nearly 60% sustained at least one injury during training. Among the 95 male recruits, the injury rate was only about 30%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the integrated company cohort, the injury rate was lower across the board: about 25% for the 85 women, and 13% for the 106 men.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The male-only company had a reported injury rate of about 14%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While lower body injuries were most common for male and female recruits by a substantial margin, women in both cohorts reported a higher rate of upper-body and torso injuries.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For female recruits in the integrated company, about half of injuries were in the torso, compared to 12.5% for males. Across the board, the most frequently injured body part for women was the hip, and for men, the knee.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One data point suggests just how much injury rates can be influenced by factors not fully captured by the research team, from fitness prior to boot camp to how a particular series training evolution was conducted.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For women in the series track, 23 injuries \u2015 about a quarter of the boot camp total \u2015 were sustained during various parts of the intense concluding exercise known as \u201cthe Crucible.\u201d For female recruits in the integrated company, zero injuries were sustained during the Crucible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For the study\u2019s authors, the data shows that injury rates can be mitigated, and it\u2019s up to the Marine Corps to develop ways to do that.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cPrevious research has shown female military personnel who perform at the same levels of fitness as their male peers can be expected to experience similar levels of injury,\u201d they wrote. \u201cFurther investigation of the risk factors for and strategies for prevention of musculoskeletal injuries among female Marine Corps recruits is recommended.\u201d<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><b>Stress levels<\/b><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The fitness tracker data and assessments of recruits\u2019 cortisol, or stress, levels through saliva collection underscored boot camp\u2019s intensity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On average, all recruits covered about 14 kilometers, or nine miles, per day and burned 4,000 calories. They logged an average of six hours of sleep per night.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Stress levels for both men and women were high over the course of boot camp in all cohorts, and stayed elevated, even when training load was decreased.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While female recruits experienced higher cortisol levels than male counterparts, the study\u2019s authors said that difference may be explained by some women\u2019s use of oral contraceptives, which affect stress response.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For the study, recruits were subjected to a series of performance tests at week two and week 11 of boot camp to show their capacity for power and force. These included a countermovement jump, or jumping \u201cas high and as fast as possible\u201d for three reps; and an isometric mid-thigh pull, where recruits pulled with all their strength on a special steel apparatus for two five-second reps.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While peak force remained relatively consistent for all groups from week two to week 11, every group performed worse on peak power performance in the second test. Researchers attributed this to muscle fatigue and exhaustion; week 11 data was collected about a day after recruits finished the Crucible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While men outperformed women in force and power at levels consistent with known physiological parameters, researchers found gender disparities might have been made more pronounced due to a workload progression not designed for resilience.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cAs the Marine Corps considers options for optimizing gender integration, recruit performance and injury data from this study suggest an opportunity to revise the training structure to be more scientifically and physiologically sound to enhance performance, reduce injury, and improve retention during the training process,\u201d the study\u2019s authors wrote. \u201cThis can be done without sacrificing the desired stress placed on the recruit to make Marines, as demonstrated by the maintained stress response throughout training, even when training load was reduced. Instead, proper progression would likely mitigate injury to otherwise very capable recruits.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A focus on proper exercise progression, \u201coften absent\u201d in training, according to the study, would improve outcomes for both female and male recruits, the authors found.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">And, they said, it would also result in healthier and more effective Marines in the fleet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cThe return on investment would also improve during new Marines\u2019 successful transition to the next phase of their military career after recruit training,\u201d they wrote. \u201cWhen considered in the context of the sociological findings, there appears to be an achievable and effective path forward to enhance the climate of success the Marine Corps has established over its existence.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the series track, female recruits dropped out of training at a lower rate, 13.3%, than their male counterparts, 21.1%. In the integrated company, the rate was slightly higher, 30.6% to 22.6%. The male-only cohort had a drop rate of 10.5%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Attrition, or involuntary training drops, were less common for women in both cohorts: 2% for female recruits in the series track compared to 5.3% of men, and 3.5% in the integrated company compared to 8.5% of men. In the male-only cohort, 5.5% of recruits attrited.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Researchers noted that women who attrited reported a \u201csignificantly lower quantity of baseline strength training physical activity\u201d prior to boot camp, a finding that indicated a strength training program prior to shipping may lower attrition rates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The study recommended a periodized approach to physical training with a greater emphasis on progression and proper technique, and further investigation of the association between strength training and resilience scores in female recruits and their attrition rates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It also called for a probe into the causes of hip injuries in female recruits and the development of customized injury mitigation programs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The commander of Marine Corps Training and Education Command, Lt. Gen. Kevin Iiams, told Marine Corps Times in a late September interview that the Corps already has taken steps to space out boot camp training hikes and seen recruit attrition decrease as a result.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Col. Howard \u201cChip\u201d Hall, the chief of staff at Training and Education Command and the Marine Corps\u2019 liaison for the study, said the service\u2019s Human Performance Branch was now closely examining its findings and determining what training adjustments could be standardized.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Marine leaders want to keep monitoring performance metrics through wearable tech and other measures, and Hall said they\u2019re especially concerned about making sure the recruit training experience remains standard across the board \u2015 although the existence of the different cohorts and their disparate outcomes shows that training is far from standardized now.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It\u2019s now yet clear which study recommendations the Marine Corps might adopt or when it may do so.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cOur plates are pretty full,\u201d Iiams said. \u201cSo there\u2019s not a timeline, but we\u2019re moving as fast as we can.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A vast trove of biometric data provides unprecedented insights into the physical experience of recruits in the 13 weeks at boot camp.<\/p>\n","protected":false},"author":7,"featured_media":63471,"comment_status":"open","ping_status":"open","sticky":false,"template":"single-post-featured-layout","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_canonical":"","_acf":"","_yoast_wpseo_primary_category":15,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","_smg_distribution_targets":[]},"categories":[29,116,15,35,88],"tags":[],"coauthors":[2659],"class_list":["post-56040","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-home","category-left-column","category-news","category-newsletters","category-your-military"],"acf":{"subheadline":"","legacy_arc_id":"JULVMUQY5JBQPAZYCIWWHDTWBE","arc_canonical_url":"\/news\/your-marine-corps\/2022\/10\/24\/what-new-injury-performance-data-tells-us-about-marine-boot-camp\/","remove_feature_photo":false,"is_sponsored":false,"subtype":"featured-layout","redirect_url":"","disable_inline_ads":false,"native_logo_pretext":"Presented 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