Relationship between bone mineral content, bone mineral density and anaerobic power in professional jumpers

Abstract

The positive effect of physical activity and exercise on bone mass is well documented in several studies comparing with sedentary subjects. Recent studies have reported that cardiovascular fi tness and weight-bearing exercise affect bone mass benefi cially. Although it is widely accepted that muscle strength is signifi cantly correlated with bone mass, little is known about anaerobic power and its relation to bone mass. Therefore, the purpose of this study was to analyse the relation between bone mass and anaerobic power in professional jumpers. Thirty professional men jumpers (long, high and triple jumping) with no history of bone disease participated in this study (mean±SD, aged 21.27±3.52 years, height 182±6 cm, weight 69.93±6.01 kg). Bone mineral content (BMC) and bone mineral density (BMD) were measured by dual-energy x-ray absorptiometry. Femoral neck and trochanter BMC and BMD for right and left sides and also lumbar spines were assessed. Sargent jump test was performed by athletes and records were converted to anaerobic power using Lewis formulae. Pearson correlation test was used to analyse data. Results of this study showed a positive relationship between femoral neck and trochanter BMC and anaerobic power (r=0.557, p<0.05). Similar result was found for femoral neck and trochanter BMD and anaerobic power (r=0.446, p<0.05). In conclusion, long-term jumping, is associated with markedly increased BMC and BMD at the femoral neck and trochanter and it can be accounted as one of the important environmental factors to determine femoral BMC and BMD in elite jumpers.

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“…The present finding was not similar to a study by Witzke and Snow (1999) who showed that leg power assessed by Wingate test was correlated with BMD at all sites except the lumbar spine. Additionally, Haydari et al (2010) also reported that there was a positive relationship between femoral neck and trochanter BMD and anaerobic power in elite jumpers (r=0.446, P<0.05). To our knowledge, the present study was the first study to assess the relationship between bone speed of sound and anaerobic capacities in non-active Malay university students who exercised less than 2 times per week, this may cause discrepancy between the findings of Haydari et al (2010) with elite jumpers and the present study with non-athletes.…”

“…Additionally, Haydari et al (2010) also reported that there was a positive relationship between femoral neck and trochanter BMD and anaerobic power in elite jumpers (r=0.446, P<0.05). To our knowledge, the present study was the first study to assess the relationship between bone speed of sound and anaerobic capacities in non-active Malay university students who exercised less than 2 times per week, this may cause discrepancy between the findings of Haydari et al (2010) with elite jumpers and the present study with non-athletes. Furthermore, differences in ethnicity may have caused the inconsistent results of the present study compared to Witzke and Snow (1999) and Haydari et al (2010).…”

Does Muscular Power Predict Bone Mineral Density in Young Adults?

“…Indeed, muscle mass and bone mass are closely related throughout life, and previous studies have documented the associations of LM with bone mineral content (BMC) and BMD (19,20). A positive relationship between bone mass and anaerobic power is reported in professional jumpers (21). On the other side, LM as well as anaerobic power are considered as the best predictors of bone mass during growth (22)(23)(24)(25).…”