In the straight-leg jump, ankles, knees and hips remained stiff and less flexible. In the normal jump, knees and ankles bent naturally while hips flexed slightly, helping absorb shock, maintain balance and produce smoother, safer movement.
You can perform these two jumps (Fig. 3.21): Straight-leg jump — keep knees and ankles stiff. Normal jump — bend knees and ankles naturally. How did your ankle, knee and hip positions differ between the two jumps?
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During a straight-leg jump, the ankles, knees and hips stay stiff with very little bending, making movement less flexible and more forceful. In a normal jump, knees and ankles bend naturally and hips flex slightly. This coordinated bending absorbs shock, improves balance, reduces stress on joints and muscles and allows smoother, safer and more efficient body movement.
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