Related Experiment Video
Updated: Jul 13, 2026

07:30
Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
Published on: May 1, 2018
15.3K
Is Hip Muscle Flexibility Associated with Low Back Pain Among First-Year Undergraduate Students?
Janan Abbas1, Noa Reif1, Kamal Hamoud1
1Department of Physical Therapy, Zefat Academic College, Zefat 13206, Israel.
Journal of Clinical Medicine
|January 8, 2025
Summary
This study found that while most students have normal hip muscle length, increased hamstring length may be linked to low back pain (LBP). Female students showed greater muscle flexibility.
Area of Science:
- Biomechanics
- Musculoskeletal Health
- Epidemiology
Background:
- Hip muscle length is crucial for lumbar spine and lower extremity function.
- Tightness in hamstring and iliopsoas muscles is correlated with low back pain (LBP).
- Undergraduates are susceptible to LBP due to prolonged sitting and poor posture.
Purpose of the Study:
- To investigate the relationship between hip muscle lengthening and low back pain in undergraduate students.
- To assess the prevalence of normal hamstring and iliopsoas muscle length in this population.
Main Methods:
- Descriptive study involving 70 undergraduate students.
- Measurement of hamstring and iliopsoas muscle length.
- Utilized a questionnaire to gather data on study habits and stress levels.
Main Results:
- A majority of participants exhibited normal hamstring (80%) and iliopsoas (96%) muscle lengthening.
- Female students demonstrated significantly higher muscle flexibility.
- Logistic regression indicated that right hamstring lengthening and stress related to studies are significantly associated with LBP.
Conclusions:
- Hip muscle length appears to be influenced by sex, with females exhibiting greater flexibility.
- Right and left muscle lengths are generally symmetrical.
- Increased hamstring length is a potential contributing factor to low back pain in this demographic.
More Related Videos
Related Concept Videos
Skeletal Muscle Anatomy
Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.
Muscle Contraction
In skeletal muscles, acetylcholine is released by nerve terminals at the motor endplate—the point of synaptic communication between motor neurons and muscle fibers. The binding of acetylcholine to its receptors on the sarcolemma allows entry of sodium ions into the cell and triggers an action potential in the muscle cell. Thus, electrical signals from the brain are transmitted to the muscle. Subsequently, the enzyme acetylcholinesterase breaks down acetylcholine to prevent excessive muscle...
Elastin is Responsible for Tissue Elasticity
Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
Blood and Nerve Supply to the Bones
Bones are dynamic organs that require a rich supply of oxygen and nutrients. Around 5% to 10% of the cardiac output supplies blood to the bones. A typical long bone has three main sources: the nutrient artery, the metaphyseal and epiphyseal arteries, and the periosteal arteries.
Nutrient Artery
The nutrient artery is the main blood vessel that enters the diaphysis via the nutrient foramen. While most long bones have only one nutrient foramen, large bones, such as the femur, may have two. This...
Nutrient Artery
The nutrient artery is the main blood vessel that enters the diaphysis via the nutrient foramen. While most long bones have only one nutrient foramen, large bones, such as the femur, may have two. This...
Disorders of the Skeletal Muscle
The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Somatic Spinal Reflexes
Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...

