Association Between Muscle Status and Bone Size, Density, and Strength in Type 1 Diabetes: A Cross-sectional Study

Area of Science:

• Endocrinology
• Bone and Mineral Metabolism
• Muscle Physiology

Background:

• Type 1 diabetes (T1D) is known to affect muscle mass and function.
• The impact of T1D on bone health, particularly concerning the relationship between muscle and bone, remains unclear.

Purpose of the Study:

• To investigate the association between muscle mass, muscle strength, and bone health in adults with a history of childhood-onset T1D.
• To compare these associations between individuals with T1D and age- and sex-matched controls.

Main Methods:

• Cross-sectional study of 111 Danish adults with T1D (onset before 18 years) and 37 controls.
• Muscle assessment via lean mass (DXA) and grip strength (dynamometer).
• Bone assessment included bone mineral density (BMD), bone size (HR-pQCT), and bone material strength index (microindentation).

Main Results:

• No significant differences in lean mass or grip strength between T1D and control groups.
• Comparable bone mineral density, bone size, and bone material strength index between groups.
• Within the T1D group, lean mass and grip strength were positively associated with femoral neck and total hip BMD.

Conclusions:

• A robust association exists between muscle indices and bone health, irrespective of T1D status.
• The muscle-bone crosstalk appears to be preserved in individuals with T1D.
• Findings suggest T1D does not alter the fundamental relationship between muscle and bone.