Related Experiment Video
Updated: Nov 25, 2025
07:30
Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
Published on: May 1, 2018
15.7K
INFLUENCE OF LIMB DOMINANCE AND SHOULDER INJURY ON STRENGTH AND EXPLOSIVE FORCE IN US MARINES
Kathleen M Poploski1, Kelsey J Picha2, Joshua D Winters3
1Department of Physical Therapy, University of Pittsburgh, Pittsburgh, PA, USA.
International Journal of Sports Physical Therapy
|December 21, 2020
Summary
United States Marines with nondominant shoulder injuries showed significant strength deficits compared to their dominant side and healthy controls. This highlights the need for individualized rehabilitation strategies based on injury side.
Area of Science:
- Orthopedics
- Sports Medicine
- Military Health
Background:
- Military roles impose high physical demands, increasing shoulder injury risk.
- Understanding bilateral shoulder strength is crucial for assessing military personnel's readiness and recovery.
Purpose of the Study:
- To evaluate strength and explosive force differences in US Marines with dominant or nondominant shoulder pathology.
Main Methods:
- A cross-sectional study involving 52 male US Marines with recent shoulder injuries.
- Measured isokinetic shoulder internal/external rotation strength and explosive push-up performance.
- Compared dominant vs. nondominant injured sides and a healthy control group.
Main Results:
- Marines with nondominant shoulder injuries exhibited significantly lower strength and explosive force on the injured side.
- No bilateral differences were found in Marines with dominant shoulder injuries.
- Nondominant injured Marines showed reduced external rotation strength compared to controls.
Conclusions:
- Nondominant shoulder injuries in Marines lead to measurable strength and performance asymmetries.
- Distinguishing between dominant and nondominant shoulder injuries is vital for accurate assessment.
- Tailored treatment strategies are necessary for effective rehabilitation in military personnel.
Related Concept Videos
01:23Muscles of the Shoulder
8.1K
The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
8.1K
01:27Exercise and Muscle Performance
2.1K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
2.1K