Association between long-term exercise loading and lumbar spine trabecular bone score (TBS) in different exercise...

Area of Science:

• Bone microarchitecture research
• Sports science and exercise physiology
• Osteoporosis and skeletal health

Background:

• Trabecular Bone Score (TBS) is a validated method for assessing lumbar vertebral bone texture.
• Different types of exercise loading can influence bone health and structure.
• Understanding the relationship between specific exercise modalities and bone microarchitecture is crucial for optimizing skeletal health.

Purpose of the Study:

• To investigate the association between different types of exercise loading and lumbar vertebral bone texture using Trabecular Bone Score (TBS).

Main Methods:

• Analysis of data from 88 Finnish female athletes across five loading groups (high-impact, odd-impact, high-magnitude, repetitive impact, repetitive non-impact) and 19 habitually active women.
• Measurement of Trabecular Bone Score (TBS) from lumbar vertebrae (L1-L4) using DXA.
• Collection of anthropometric data, body composition, muscle strength (leg press), jumping force, and lumbar bone mineral density (BMD).

Main Results:

• Endurance runners exhibited a mean TBS approximately 6% lower than the reference group, a statistically significant difference.
• This difference in TBS for endurance runners remained significant after adjusting for body height, isometric leg press force, and fat percentage.
• The association between endurance running and lower TBS persisted even after controlling for lumbar bone mineral density (BMD).

Conclusions:

• Exercise loading history involving repetitive moderate impacts, as seen in endurance runners, is associated with a lower Trabecular Bone Score (TBS).
• This finding suggests that endurance running may be linked to specific alterations in lumbar vertebral microarchitecture.
• Further research is warranted to elucidate the long-term implications of these microarchitectural changes for bone health in endurance athletes.