Sex-Specific Associations Between Sagittal Spinal Alignment and Postural Control in Recreational Strength-Trained...

Area of Science:

• Biomechanics
• Exercise Physiology
• Human Movement Science

Background:

• Strength training offers significant health benefits but carries injury risks due to improper technique and balance deficits.
• Existing research shows sex differences in spinal curvature and postural control in the general population.
• It is unclear if these sex-specific differences persist in individuals engaged in regular strength training.

Purpose of the Study:

• To investigate sex-specific differences in sagittal spinal alignment and static balance among recreationally strength-trained young adults.
• To examine potential associations between spinal curvature and postural control in this population.
• To test the hypothesis that sex-related differences in alignment and balance persist despite training.

Main Methods:

• A cross-sectional study involving 124 young adults (59.7% men, 40.3% women).
• Sagittal spinal curvature assessed using an electronic inclinometer.
• Static balance evaluated using a stabilometric platform under eyes-open and eyes-closed conditions.

Main Results:

• Significant sex-related differences were found in sacral angle and lumbar lordosis.
• Sex differences in balance parameters were observed under both eyes-open and eyes-closed conditions.
• In women, sacral inclination showed a positive correlation with specific balance parameters.

Conclusions:

• Sex-specific differences in sagittal spinal curvature and static balance exist even in strength-trained individuals.
• Sacral alignment is associated with balance performance in women.
• These findings underscore the importance of considering sex and spinal biomechanics for postural control assessments in trained populations.