Introduction of Interactive Weightbearing Exercise with Low Magnitude High Frequency Vibration Application
Interactive Weightbearing Exercise Platform provides low-magnitude high-frequency vibration at 35Hz and 0.3g (g is gravitational acceleration). This is a non-invasive biophysical approach to provide vibration stimulation to the musculoskeletal system on principle of Interactive Weightbearing Exercise. The low magnitude generates a displacement of <0.2mm, which is within the vibration safety zone of ISO2631. This is a safe biophysical modality.

Our clinical study found that muscle fiber type IIA and IIB decreased with age, leading to deterioration in muscle quality and balancing coordination in elderly. Interactive Weightbearing Exercise application may help to provide the lost frequency range originally generated by contraction of muscle fiber type IIA/B. During Interactive Weightbearing Exercise application, muscles interactively contract and induce a resonance effect at bone tissues due to muscle-bone interaction.

Some reports indicate that vibration is osteogenic in postmenopausal women. Interactive Weightbearing Exercise can induce muscle gain and enhance blood circulation. Our clinical studies also found that Interactive Weightbearing Exercise can enhance the balancing ability of postmenopausal women in movement velocity and directional control, which imply the improvement of sensory perceptual functions and muscle quality. Also, the bone mineral density (BMD) at spine and tibia of the treated women increased after 1-year treatment.

The effects of Interactive Weightbearing Exercise application on fracture healing were proven in a rat model. Results showed that Interactive Weightbearing Exercise could accelerate both normal and osteoporotic femoral shaft fracture healing by 30%, as confirmed radiologically, densitometrically and biomechanically. Based on these evidences, a randomized controlled trial using the Interactive Weightbearing Exercise application on osteoporotic intertrochanteric fracture in elderly female patients was conducted. Updated results of this on-going study showed that Interactive Weightbearing Exercise application significantly enhanced hip bone mineral density (BMD) and significantly retarded the distal tibial BMD loss after 6 months. Improvement in hip range of motion, daily activities performance and better fracture impaction were also observed, without any complications. All the elderly patients can tolerate the Interactive Weightbearing Exercise treatment well from the early postoperative period. This confirms the feasibility, efficacy and safety of Interactive Weightbearing Exercise application on fractured patients.

The above scientific findings suggest that Interactive Weightbearing Exercise application is of high potential to improve bone quality, muscle performance, neuro-muscular coordination, and circulation. Interactive Weightbearing Exercise Platform enhances musculoskeletal performance which will ultimately improve your quality of life.


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  3. Leung KS, Sze PC, Mok HW, Cheung WH, Qin L. Effectiveness of low-magnitude high-frequency vibration in retardation of bone loss and improvement of balancing ability among postmenopausal women. 54th Annual Meeting of Orthopaedic Research Society. San Francisco, CA, USA. 2-5 March, 2008. Podium presentation no. 275.

  4. Leung KS, Shi HF, Cheung WH, Qin L, Ng WK, Tam KF, Tang N. Low-magnitude high-frequency vibration accelerates callus formation, maturation and fracture healing in rats. J Orthop Res. 27(4):458-65, 2009.

  5. Shi HF, Cheung WH, Qin L, Leung AH, Leung KS. Low-magnitude high-frequency vibration treatment augments fracture healing in ovariectomy-induced osteoporotic bone. Bone. 2010. (in press)

  6. Leung KS, Mok HW, Cheung WH, Liu PL, Chan T, Chan SY, Mak WY. Low-magnitude high-frequency vibration enhances fracture healing and rehabilitation in elderly with intertrochanteric fractures. The Fourth International Meeting of Chinese Orthopaedic Association (COA). Xiamen, China. 19-22 Nov, 2009. P.309. [F13-22-05]

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