National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, China.
Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Chengdu 610065, China.
Int J Environ Res Public Health. 2021 Mar 11;18(6):2879. doi: 10.3390/ijerph18062879.
Previous studies investigating the effect of excessive weight on the foot have commonly been cross-sectional; therefore, it is still unclear how the foot function gradually changes with the increased body mass that is physiologically gained over time. This study aimed to use a load transfer method to identify the mechanism of how the foot function changed with the increased excessive body mass over two years. Taking normal weight as the baseline, fifteen children became overweight or obese (group 1), and fifteen counterparts maintained normal weight (group 0) over the two years. Barefoot walking was assessed using a Footscan plate system. A load transfer method was used based upon the relative force-time integral (FTI) to provide an insight into plantar load transference as children increased in weight. Significantly increased FTIs were found at the big toe (BT), medial metatarsal (MM), lateral metatarsal (LM), and lateral heel (HL) in group 1, while at BT, MM, medial heel (HM), and HL in group 0. Foot load showed a posterior to anterior transferal from midfoot (2.5%) and heel (7.0%) to metatarsal and big toe in group 1. The control group, however, shifted the loading within the metatarsal level from LM to HM (4.1%), and equally relieved weight from around the midfoot (MF) (3.0%) to BT, MM, HM and HL. Earlier weight loss intervention is required to prevent further adverse effects on foot functions caused by excessive weight-bearing.
先前研究超重对足部影响的通常是横断面研究，因此，仍不清楚随着时间推移生理性增加的体重对足部功能的影响是如何逐渐变化的。本研究旨在采用负荷传递方法，确定超重儿童体重增加两年期间足部功能改变的机制。以正常体重为基线，15 名儿童超重或肥胖（组 1），15 名对照者保持正常体重（组 0）两年。采用 Footscan 平板系统评估裸足行走。基于相对力-时间积分（FTI）采用负荷传递方法，深入了解儿童体重增加时足底负荷的转移情况。结果发现，组 1 的大脚趾（BT）、内侧跖骨（MM）、外侧跖骨（LM）和外侧跟骨（HL）的 FTI 显著增加，而组 0 的 BT、MM、内侧跟骨（HM）和 HL 的 FTI 显著增加。足部负荷在组 1 中从足中部（2.5%）和跟部（7.0%）向后足至跖骨和大脚趾转移，而对照组则将负荷在跖骨水平从 LM 转移至 HM（4.1%），并从足中部（MF）（3.0%）同样减轻到 BT、MM、HM 和 HL 的负荷。需要更早进行减重干预，以防止因过度负重对足部功能造成进一步的不良影响。
