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Prevention of Musculoskeletal Injuries in Slovenian Armed Forces

Prevention of Musculoskeletal Injuries in Slovenian Armed Forces

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03415464
Enrollment
160
Registered
2018-01-30
Start date
2017-01-01
Completion date
2018-09-30
Last updated
2023-02-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Ankle Injuries and Disorders, Knee Injuries and Disorders, Low Back Pain

Brief summary

Physical readiness of military personnel is a cornerstone of any army, as soldiers are expected to meet high physical demands on a daily basis, and soldiers must complete one hour of physical conditioning each day. Participation in physical conditioning increases the risk of musculoskeletal injuries, and our 10-year retrospective analysis shows that 5% of soldiers sustain a sports injury during physical conditioning each year, and that ankle and knee injuries have the highest incidence rates of 25% and 20%, respectively. The primary objective of our study is to decrease the rate of ankle and knee injuries by implementing a preventive training program. The study is designed as a prospective randomized controlled trial with two arms (experimental and control).

Detailed description

Members of Slovenian Armed Forces - SAF (age range 18-51 years) are expected to participate in the study. Prior to recruitment the whole project will be explained to soldiers in a form of briefing during which they have the opportunity to ask and have answers to any questions concerning the nature of subsequent research. Following that explanation each participant will sign a consent form to voluntarily participate. No compensation will be given or promised for participation in a study that was approved by the Ethical board of the Faculty of Sport in Ljubljana (No. 454/2017). At the time of testing all soldiers must be free of acute injuries and should not reported any pain in musculo-skeletal system. Prior to the implementation of the preventive program all participants will underwent the set of functional testing that includes counterMovement jump (CMJ) testing, stork balANce test, pUll-ups, single leg hAmstrings bridge test, and loaded prone pLank test - MANUAL. Following initial testing a 15-week preventive training program will be implemented in experimental group, while control group will be training as usual. Following the intervention final testing will be performed to check for effectiveness of the intervention. After that a follow-up period will start during which injuries will be registered in both groups and later compared between groups (control and experimental) and within (2016-2017 injuries) groups to see if incidence rate of ankle and knee injuries has fallen.

Interventions

OTHERExercise

neuromuscular training

Sponsors

University of Ljubljana
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

* no major injuries that would require more than 4 weeks to recover upon entry into the study * age \>18 y * finished initial Army training

Design outcomes

Primary

MeasureTime frameDescription
Number of Soldiers With Ankle and Knee Injuries1 yearPercentage of soldiers with ankle and knee injuries during the study period.

Secondary

MeasureTime frameDescription
Vertical Jump Performance15 weeksjump height in countermovement jump
Pull-ups Performance15 weeksnumber of overhand pull-ups in one minute
Hamstring Repetitive Strength15 weeksNumber of single leg raises on the 60 cm box

Countries

Slovenia

Participant flow

Recruitment details

Recruitment was from January to February 2017.

Pre-assignment details

Initially, there were 160 soldier who approved to participate in initial testing, but prior to assignment of participants to groups 55 of them has declined further participation for different reasons, so only 105 soldiers was later randomised into groups, but the completion rate after this point was 100%.

Participants by arm

ArmCount
Functional Training
15 weeks of structured exercise intervention in the form of functional training. We have divided 15 weeks into 5 cycles each cycle lasting 3 weeks. Intervention was administered twice per week, and each session lasted 45 minutes. Each 45 minutes was further divided into 10 minutes of functional warm-up, 30 minutes of neuromuscular training (strength, agility, balance, coordination) and 5 minutes of cool down. During the 3 week period the intensity of exercise was increased with different form of same exercise, different number of repetitions and exercise duration. Exercise: neuromuscular training
64
Regular Army Training
Regular military training.
41
Total105

Baseline characteristics

CharacteristicFunctional TrainingTotalRegular Army Training
Age, Continuous30 years
STANDARD_DEVIATION 6
32 years
STANDARD_DEVIATION 6
34 years
STANDARD_DEVIATION 6
Countermovement jump height28.3 centimeters
STANDARD_DEVIATION 3.9
27.4 centimeters
STANDARD_DEVIATION 4.5
26.0 centimeters
STANDARD_DEVIATION 4.9
Loaded countermovement jump height25.2 centimeters
STANDARD_DEVIATION 3.3
24.6 centimeters
STANDARD_DEVIATION 4.2
23.5 centimeters
STANDARD_DEVIATION 5.1
Loaded prone plank119 time in seconds
STANDARD_DEVIATION 48
117 time in seconds
STANDARD_DEVIATION 49
115 time in seconds
STANDARD_DEVIATION 50
Pull ups4 number of repetitions
STANDARD_DEVIATION 4
4 number of repetitions
STANDARD_DEVIATION 4
4 number of repetitions
STANDARD_DEVIATION 4
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
64 Participants105 Participants41 Participants
Sex: Female, Male
Female
1 Participants5 Participants4 Participants
Sex: Female, Male
Male
63 Participants100 Participants37 Participants
Single leg bridge test (left leg)25 number of repetitions
STANDARD_DEVIATION 8
25 number of repetitions
STANDARD_DEVIATION 8
25 number of repetitions
STANDARD_DEVIATION 7
Single leg bridge test (right leg)26 number of repetitions
STANDARD_DEVIATION 9
27 number of repetitions
STANDARD_DEVIATION 8
27 number of repetitions
STANDARD_DEVIATION 7
Stork balance test (left leg)14 time seconds
STANDARD_DEVIATION 13
14 time seconds
STANDARD_DEVIATION 13
13 time seconds
STANDARD_DEVIATION 13
Stork balance test (right leg)14 time in seconds
STANDARD_DEVIATION 13
14 time in seconds
STANDARD_DEVIATION 13
13 time in seconds
STANDARD_DEVIATION 14

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 640 / 41
other
Total, other adverse events
0 / 640 / 41
serious
Total, serious adverse events
0 / 640 / 41

Outcome results

Primary

Number of Soldiers With Ankle and Knee Injuries

Percentage of soldiers with ankle and knee injuries during the study period.

Time frame: 1 year

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Functional TrainingNumber of Soldiers With Ankle and Knee Injuries1 Participants
Regular Army TrainingNumber of Soldiers With Ankle and Knee Injuries3 Participants
p-value: 0.134Chi-squared
Secondary

Hamstring Repetitive Strength

Number of single leg raises on the 60 cm box

Time frame: 15 weeks

ArmMeasureValue (MEAN)Dispersion
Functional TrainingHamstring Repetitive Strength25 repeitionsStandard Deviation 8
Regular Army TrainingHamstring Repetitive Strength25 repeitionsStandard Deviation 7
Secondary

Pull-ups Performance

number of overhand pull-ups in one minute

Time frame: 15 weeks

ArmMeasureValue (MEAN)Dispersion
Functional TrainingPull-ups Performance6 repetitionsStandard Deviation 4
Regular Army TrainingPull-ups Performance4 repetitionsStandard Deviation 4
Secondary

Vertical Jump Performance

jump height in countermovement jump

Time frame: 15 weeks

ArmMeasureValue (MEAN)Dispersion
Functional TrainingVertical Jump Performance35.4 centimetersStandard Deviation 10.3
Regular Army TrainingVertical Jump Performance29.9 centimetersStandard Deviation 10.8

Source: ClinicalTrials.gov · Data processed: Feb 23, 2026