Exercise Modalities to Preserve Muscle Mass and Bone Health After Metabolic Bariatric Surgery

Area of Science:

• Exercise physiology
• Bariatric surgery outcomes
• Metabolic health

Background:

• Metabolic bariatric surgery (MBS) effectively reduces fat mass but may impact muscle and bone mass.
• Optimal exercise strategies for preserving lean mass post-MBS are not well-defined.

Purpose of the Study:

• To evaluate the effects of aerobic, resistance, and combined exercise on body composition, bone mineral density (BMD), and physical function after MBS.
• To identify the most effective exercise regimen for preserving lean mass and bone health post-MBS.

Main Methods:

• Randomized controlled trial involving four groups: aerobic, resistance, combined exercise, and control.
• A 26-week supervised exercise program with progressive intensity.
• Primary outcome: change in fat-free mass (FFM) measured by DXA; secondary outcomes included BMD, body composition, and physical function tests.

Main Results:

• Combined exercise preserved FFM and reduced FM more than the control group.
• Aerobic training attenuated hip and femoral neck BMD loss compared to control.
• Resistance training best preserved handgrip strength, which correlated with protein intake.

Conclusions:

• Combined aerobic and resistance training improves body composition post-MBS by preserving FFM and reducing FM.
• Aerobic training is most effective at attenuating bone loss.
• Individualized exercise strategies are recommended to optimize metabolic, musculoskeletal, and functional health after MBS.