In addition, many serious riders burn more calories in a day than they consume, an energy imbalance that is being studied to determine its impact on bone loss.
另外，很多训练严格的自行车运动员一天消耗的热量超过摄入量，这种能量失衡有可能会影响骨质流失。
2
The riders, aged 27 to 44, began with slightly below-average bone density.