Exercise Influence on Bone Health in Rodent Models

Mechanical loading through physical activity profoundly shapes skeletal architecture and strength. Rodent models have permitted detailed investigation of how different exercise modalities—ranging from moderate treadmill running to high‐impact loading and interval training—affect both trabecular and cortical compartments. During growth, controlled impact stimulates osteogenesis and enhances bone mineral density, while in adulthood exercise can mitigate age‐ or hormone‐related bone loss. Exercise alters the balance between osteoblast and osteoclast activity, modifies bone microarchitecture, and influences systemic factors such as muscle force, hormonal milieu and nutrient distribution. These findings inform our understanding of skeletal adaptation, with implications for osteoporosis prevention, rehabilitation after fracture and optimisation of paediatric bone development.

Research from Nature Portfolio

Recent studies have elucidated the dose‐dependent effects of mechanical loading intensity and duration. One investigation applied low, medium and high impact amplitudes to growing rats and demonstrated that higher impact levels, although slightly reducing longitudinal growth, significantly increased trabecular thickness, cortical area and biomechanical resistance at skeletal maturity. Another study explored high‐intensity interval training (HIIT) in mice housed under differing spontaneous activity conditions, revealing that long‐term HIIT combined with high voluntary activity may paradoxically diminish certain biomechanical properties, whereas an active lifestyle in the absence of excessive training supports mineral accrual and bone resilience. Together, these works underscore the complex interplay between impact magnitude, exercise regime and baseline activity in shaping bone quality.

Exercise Influence on Bone Health in Rodent Models publication trend

The graph below shows the total number of articles in exercise influence on bone health in rodent models across all publications each year (not limited to Nature Index journals).

Technical terms

Trabecular bone: Spongy inner bone tissue with a porous microarchitecture that confers strength and flexibility.

Cortical bone: Dense outer bone layer that provides structural support and resists bending.

Osteoblast: Cell type responsible for bone formation and mineral deposition.

Osteoclast: Cell type that resorbs bone, critical for remodelling.

High-intensity interval training (HIIT): Repeated short bursts of vigorous exercise alternated with rest or low‐intensity periods.

Micro-CT: X-ray imaging technique that yields high-resolution three-dimensional bone microstructure data.

References

1. Effects on Bone and Muscle upon Treadmill Interval Training in Hypogonadal Male Rats. Biomedicines (2023).
2. High Impact Exercise Improves Bone Microstructure and Strength in Growing Rats. Scientific Reports (2019).
3. Effects of high-intensity interval training in more or less active mice on biomechanical, biophysical and biochemical bone parameters. Scientific Reports (2021).
4. The Effect of Moderate-Intensity Treadmill Exercise on Bone Mass and the Transcription of Peripheral Blood Mononuclear Cells in Ovariectomized Rats. Frontiers in Physiology (2021).
5. Does Physical Exercise Always Improve Bone Quality in Rats?. Life (2020).