The right answer is True.
According to the Mann study in 2001, it was found that there was a greater risk of injury when using ballistic stretching in the routines. Indeed, because of the rebound movement, the ballistic stretching leads to continuous shooting on the muscle junction that triggers the myotatic reflex. Unlike static stretching, ballistic stretching has the potential to increase core body temperature, especially since the movement is aggressive and physically more demanding.
The Proprioceptive Neuromuscular Facilitation (PNF) has replaced ballistic stretching, but this routine has its own weaknesses. PNF was an effective means of increasing flexibility because it combines the idea of static stretching with isometric contraction (according to the 2006 Sharman study).