Final answer:
Ballistic stretching and PNF stretching are techniques for improving flexibility with specific benefits and risks.
Explanation:
Ballistic stretching involves forceful bouncing or ball-like movements that quickly exaggerate the joint's ROM without holding the position for any particular duration. This type of stretching is specific to athletes and can increase flexibility, but it has potential risks such as muscle soreness and injury. PNF stretching is another technique that involves contracting and relaxing muscles to improve static flexibility; although effective, it requires a knowledgeable partner and can cause soreness.
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