A research group from J. F. Oberlin University, Waseda University, Chukyo University, and Surugadai University has presented research results showing bone mineral density and bone mineral density of sumo wrestlers, for which data has been limited even internationally.It turns out that as you gain weight, your bones don't increase proportionately.
In sumo, body size can be a factor that determines victory or defeat.In a previous study by the research group, university sumo wrestlers (average body weight 109.1 kg) had adipose tissue of 62.0 kg, skeletal muscle mass of 25.7 kg, liver mass of 12.4 kg, My kidney weighed 1.00 kg.However, sumo wrestlers' reports on bone mineral content (bone mineral content) and bone density have been limited.
This time, in a study of more than 50 university sumo wrestlers, the heavy weight group (115 kg or more) had higher bone mineral content in the whole body and arms and legs than the middle weight group (85 kg or more and less than 115 kg). turned out.On the other hand, the respective bone mineral content per body weight was lower in the heavyweight group.
The heavy weight group had higher bone density in the whole body and legs, but no difference in the arms from the middle weight group.Across both groups, there was also a weak but significant positive correlation between body weight and total and leg BMD.
Compared to Japanese men in their twenties with an average weight of 65.6 kg in previous studies, the average weight of college sumo wrestlers in this study was about 20% heavier in the middle weight group and about 50% heavier in the heavyweight group. Mean bone density remained around 100% higher in both groups.
It was shown that even well-trained university sumo wrestlers with large physiques cannot easily obtain the bone mineral content and bone density corresponding to their body weight.Previous research has shown that body weight increases over 100 kg slow down the increase in whole-body bone mineral content, and combined with the results of this study, it can be used as basic data to explore the upper limits of bone mineral content and bone density in animals such as humans. .
Paper information:[Scientific Reports] Characteristics of total body and appendicular bone mineral content and density in Japanese collegiate Sumo wrestlers
