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Interrupted vs. uninterrupted training on BMD during growth.
B M Goettsch1, M Z Smith, J A O'Brien
1Department of Biological Sciences, Chapman University, Orange, California 92866, United States.
International Journal of Sports Medicine
|July 11, 2008
Summary
Both interrupted and uninterrupted resistance training equally enhance bone modeling and bone mineral density (BMD) in young animals. This study found no significant difference between continuous repetitions versus multiple daily sessions for improving bone health markers.
Area of Science:
- Exercise Physiology
- Bone Biology
- Animal Models
Background:
- Resistance training is crucial for bone health.
- Understanding optimal training protocols for bone modeling is important.
- Previous research has not directly compared interrupted versus uninterrupted resistance training for bone outcomes.
Purpose of the Study:
- To compare the effects of uninterrupted (UT) versus interrupted (IT) resistance training on bone modeling and bone mineral density (BMD).
- To determine if training session structure influences bone adaptation in maturating animals.
Main Methods:
- 24 young male rats were divided into Control, UT, and IT groups.
- UT and IT groups performed ladder climbing with weights 3 days/wk for 6 weeks.
- Bone modeling markers (serum osteocalcin, urinary deoxypyridinoline [DPD]) and tibial BMD were assessed.
Main Results:
- Both UT and IT resistance training significantly reduced urinary DPD compared to controls.
- Tibial BMD was significantly higher in both UT and IT groups versus controls.
- No significant differences in DPD or BMD were observed between the UT and IT groups.
Conclusions:
- Both interrupted and uninterrupted resistance training programs are equally effective in stimulating bone modeling.
- The structure of resistance training sessions (continuous vs. interrupted) does not appear to impact bone adaptation when total work volume is equivalent.
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