Which of the following is an effect of heat when applied to soft tissues?

Therapeutic use of heat, or thermotherapy, results in several benefits including extensibility of collagen. This can result in an increase of soft tissue length with less force required during stretching. There is also a decreased risk of tissue tearing due to reduced force and increased collagen extensibility. Other effects of superficial heat applications such as hot packs are: pain control, increased joint ROM, increased circulation and accelerated healing.