41% team members were lack of lumbar and abdominal muscle strength, and could not do the abdomen-contracting leg-elevating training on 20-time tiltboard 60 °;
41%的队员腰腹肌力不足，不能完成20次的斜板（60°）收腹举腿训练；
41 % team members were lack of lumbar and abdominal muscle strength, and could not do the abdomen-contracting leg-elevating training on 20-time tiltboard 60 °;