Objective: To compare the effects of aerobic dance training on mini-trampoline and hard wooden surface on bone resorption,
health-related physical fitness, balance, and foot plantar pressure in Thai working women.
Material and Method: Sixty-three volunteered females aged 35-45 years old participated in the study and were divided into
3 groups: A) aerobic dance on mini-trampoline (21 females), B) aerobic dance on hard wooden surface (21 females), and C)
control group (21 females). All subjects in the aerobic dance groups wore heart rate monitors during exercise. Aerobic dance
worked out 3 times a week, 40 minutes a day for 12 weeks. The intensity was set at 60-80% of the maximum heart rate. The
control group engaged in routine physical activity. The collected data were bone formation (N-terminal propeptine of procollagen type I: P1NP) bone resorption (Telopeptide cross linked: β-CrossLaps) health-related physical fitness, balance, and foot plantar pressure. The obtained data from pre- and post trainings were compared and analyzed by paired samples
t-test and one way analysis of covariance. The significant difference was at 0.05 level.
Results: After the 12-week training, the biochemical bone markers of both mini-trampoline and hard wooden surface aerobic dance training subjects decreased in bone resorption (β-CrossLaps) but increased in bone formation (P1NP). Health-related physical fitness, balance, and foot plantar pressure were not only better when comparing to the pre-test result but also
significantly different when comparing to the control group (p<0.05). The aerobic dance on mini-trampoline showed that leg muscular strength, balance and foot plantar pressure were significantly better than the aerobic dance on hard wooden surface (p<0.05).
Conclusion: The aerobic dance on mini-trampoline and hard wooden surface had positive effects on biochemical bone
markers. However, the aerobic dance on mini-trampoline had more leg muscular strength and balance including less foot
plantar pressure. It is considered to be an appropriate exercise programs in working women.

Keywords: Aerobic dance on mini-trampoline, Aerobic dance on hard wooden surface, Bone resorption (Telopeptide cross
linked: β-CrossLaps or CTx), Balance, Health-related physical fitness, Foot plantar pressure