拉伸股四头肌：股四头肌是大腿前侧的肌肉，对于你提升膝盖和提高速度很重要。
Quadriceps Stretch: the quadriceps is the muscle in the front of the thigh, important for lifting your knees and increasing your speed.
通过轻轻地将大腿骨压向地面来收缩股四头肌。
Contract your quads by gently pressing your thighbones down into the floor.
因此，您所选择的工作应该利用你的最大的肌肉，这是您和您的臀大肌股四头肌…你和你的大腿对接。
Therefore, your choice of exercise should make use of your largest muscles, which are your gluteus maximus and your quadriceps... your butt and your thighs.
股四头肌使大腿肌肉向下缩短，膝盖伸直。
The quadriceps muscles down the front of the thighs shorten to straighten the knees.
该研究主要关注离心运动，该运动在下山的过程中人类的大腿股四头肌所经历的锻炼相似。
The research focused on eccentric exercise, which creates a motion similar to the way in which quadriceps in human thighs are exercised during a downhill run.
大腿前侧的股四头肌使膝关节伸直。
The quadriceps at the front of the thigh straightens the knee.
股四头肌和大腿前侧使膝盖伸直。
The quadriceps along the front of the thigh straightens the knee.
股直肌（穿过骨盆连结到大腿前侧的一块肌肉）与另外两块肌肉共同作用使腿伸直。
One of the muscles that crosses the hip and runs down the front of the thigh- the rectus femoris- work in concert with the other two muscles to stabilize the leg.
股四头肌处于大腿前侧，有力收缩使膝盖伸直。
The quadriceps muscles along the front of the thigh firmly contract to straighten the knees.
加强和提升股四头肌(大腿前侧)的动作也应该提起膝盖。
The action of firming and lifting your quadriceps (front thigh) muscles should also raise your kneecaps.
股四头肌的一个头——股直肌，从大腿前方纵贯而下，穿过髋关节和膝关节。
One of the quadriceps group of muscles, the rectus femoris, runs down the front of the thigh and crosses both the hip joint and the knee joint.
不过，他们确知的事是，加强大腿股四头肌的力量，可减低关节进一步受损的机会。
They point out, however, that strengthening the quadriceps could prevent further damage.
不过，他们确知的事是，加强大腿股四头肌的力量，可减低关节进一步受损的机会。
They point out, however, that strengthening the quadriceps could prevent further damage.
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