Quadriceps Stretch: the quadriceps is the muscle in the front of the thigh, important for lifting your knees and increasing your speed.

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。

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Engage your quadriceps (front muscle on thigh) and extend your torso until you can melt over your legs.

使用你的四头肌(前面的大腿肌肉)并延长你的躯干直到你能够将你的腿弄软。

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His condition, patellar tendinitis, can be described as inflammation of the tendon that attaches the quadriceps (thigh muscle) to the tibia (shin bone).

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