Related Experiment Video
Updated: Jan 24, 2026
08:29
In vivo Measurement of Knee Extensor Muscle Function in Mice
Published on: March 4, 2021
5.6K
Relationship Between Hip Extensor Strength and Back Extensor Length in Patients With Low Back Pain: A Cross-Sectional
Amir Massoud Arab1, Manijeh Soleimanifar2, Mohammad Reza Nourbakhsh3
1Department of Physical Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Tehran, Iran.
Summary
Weak hip extensor strength and shortened back extensor muscles are linked to low back pain (LBP) in men. These muscle impairments increase the risk of developing LBP.
Area of Science:
- Musculoskeletal health
- Biomechanical analysis
- Pain research
Background:
- Low back pain (LBP) is a prevalent condition with multifactorial causes.
- Muscle imbalances, including hip extensor weakness and back extensor tightness, are suspected contributors to LBP.
Purpose of the Study:
- To investigate the association between hip extensor strength and back extensor length in individuals with and without LBP.
- To determine if these muscle characteristics are risk factors for LBP.
Main Methods:
- Compared hip extensor strength and back extensor length in 266 LBP patients and 215 controls.
- Utilized independent t-tests, Pearson correlation, and multivariate logistic regression.
Main Results:
- Significant differences in hip extensor strength between LBP patients and controls (P < .001).
- Significant relationship found between back extensor length and hip extensor strength in men with LBP (r = 0.6, P = .01).
- Weak hip extensors (P = .001) and shortened back extensors (P = .01) increased LBP risk.
Conclusions:
- Findings suggest muscle imbalance (hip extensor weakness, back extensor tightness) in male LBP patients.
- Individual muscle impairments may contribute to the development of LBP.
Related Concept Videos
01:50Cross-Sectional Research
12.4K
In cross-sectional research, a researcher compares multiple segments of the population at the same time. If they were interested in people's dietary habits, the researcher might directly compare different groups of people by age. Instead of following a group of people for 20 years to see how their dietary habits changed from decade to decade, the researcher would study a group of 20-year-old individuals and compare them to a group of 30-year-old individuals and a group of 40-year-old...
12.4K
01:26Profile Leveling and Cross Sections
1.6K
Profile leveling and cross-sections are surveying methods used to determine and document terrain elevations for infrastructure projects such as highways, railroads, canals, and pipelines. These methods provide data for earthwork planning and alignment of proposed routes. Profile leveling involves measuring elevations along a fixed line to create a vertical terrain profile. A surveyor sets up a leveling instrument at the benchmark (BM) and records a backsight (BS) to determine the...
1.6K
01:16Spinal Cord: Cross-sectional Anatomy
4.5K
The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
Gray Matter and its Components
Central to the gray matter is...
Gray Matter and its Components
Central to the gray matter is...
4.5K
01:18Dihybrid Crosses
80.9K
Overview
80.9K
02:12Relationship Formation
45.2K
What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
45.2K
02:29Relative Strengths of Conjugate Acid-Base Pairs
51.6K
Brønsted-Lowry acid-base chemistry is the transfer of protons; thus, logic suggests a relation between the relative strengths of conjugate acid-base pairs. The strength of an acid or base is quantified in its ionization constant, Ka or Kb, which represents the extent of the acid or base ionization reaction. For the conjugate acid-base pair HA / A−, the ionization equilibrium equations and ionization constant expressions are
51.6K