本研究的目的在探討雙手插腰垂直跳起跳期，膝、踝關節聯合運動的現象
。以十五位男性運動員與十五位男性非運動員為受試者，以 KINEMETRIX
3D 動作分析系統為主要研究儀器，經資料處理歸納為以下結論：
（一）在角度上：膝關節彎曲範圍自平均 173.94 度至平均 61.06 度，
伸展範圍自平均 61.06 度至平均 158.29 度；踝關節彎曲範圍自平均
118.30 度至平均 85.17度；伸展範圍自平均85.17度至平均143.97度。
（二）在時間上：膝關節的彎曲時間平均為 0.63 秒，伸展時間平均為
0.28 秒； 踝關節的彎曲時間平均為 0.59 秒，伸展時間平均為 0.27
秒。
（三）在關節屈、伸時間比率上：膝、踝關節的屈、伸時間比率約為
7：3。
（四）在相對時間比率上：膝關節開始彎曲時踝關節慢了 6﹪的膝總動作
時間才開始彎曲；於 69﹪膝總動作時間時，膝關節彎曲達最小角度，踝
關節則是在 70﹪膝總動作時間時彎曲達最小角度；最後在 100﹪膝總動
作時間時，腳尖離地。
（五）優秀運動員較非運動員在動作上具有較大的腳尖離地角度、較快的
關節伸展速度及較一致的膝、踝關節屈、伸時間比率等特徵。

The purpose of this study was to explore the phenomenon of the
cooperative movement between knee and ankle joints during
takeoff phase of vertical jumping performance with arms
akimboed. 15 elit male athletes and 15 male non-athletes were
subjects at this study . KINEMETRIX 3D motion analysis system
were used to collect data . After data treatment , the results
were reached followings：
1.In angles：The range of knee bending was from average 173.94°
to 61.06°；knee extending was{EMBED Equation.2 \* mergeformat|
from average 61.06° to 158.29°； ankle bending was from }
average 118.30° to 85.17°；ankle extending was from average
85.17°to 143.97°.
2. In motion times：The average time of knee bending was 0.63
second , knee extending was 0.28 second ；ankle bending was
0.59 second , ankle extending was 0.27 second .
3. In time ratio betwen joint bending and extending ：The time
ratio between bending and extending of knee and ankle joints was
7：3 .
4. In relative time ratios：Knee joint started bending at first,
and then ankle joint started bending after 6 ﹪total motion time
of knee joint (TKM)；at the time of 69 ﹪TKM , knee joint bended
to the smallest angle, ankle joint bended to the same situation
at 70﹪ TKM；finally, toe leaved the ground at the time of 100﹪
TKM.
5. By comparing with non-athletes , the characteristics of elit
athletes' motion were larger joint angles of toe-off , faster
joint extending velocity and more constent time ratio of bending
and extending of knee and ankle joint .
The purpose of this study was to explore the phenomenon of the