limbering怎么读？

v.（做运动）使身体灵活( limber的现在分词 )，（赛前）做准备活动，把（火炮）系在前车上，（体育运动、比赛等前）做准备活动...

The candidates are already limbering up for the election campaign.各候选人已经在为竞选运动热身了.We start by doing limbering up exercises and then go on to do the aerobics.我们先做些柔软运动灵活四肢,再做有氧运动....