求翻译：但是竞走腿部技术动作直膝后扒的完成需要练习者完成充分向后的扒地，因此如果练习中可以给予水平向后的一定阻力，那么将有助于直膝后扒充分、增大步幅、降低重心，最大限度避免腾空和屈膝的出现。是什么意思？

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However, walking legs, technology moves straight back to the need to exercise the full to the rear of the tooth, so if you practice, you can give body horizontally to the back of the resistance, you can help to direct laptop search after fully, in stride, lower the center of gravity, minimizing vaca

But after the heel-to-toe walking race leg department technology movement straight knee digs up completes needs the practitioner to complete fully backward digs up, if therefore practices to be possible to give the human body level backward certain resistance, then will be helpful after the straight

But walking leg movements straight knee Grill needs to practice when completing full backward or paws, so if the level of exercise can give the body back a certain resistance, would contribute to the straight posterior knee Grill full, increase stride length, lower center of gravity, maximum limit a

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