Class 4 Laser, also known as cold laser, therapy is used by physical therapists to help accelerate the healing process at an injured site. The therapist either holds a wand over the injured area or sets the laser to mechanically move around a specific area, and then emits a light at a specific wavelength to create energy on a cellular level to boost healing. This treatment is painless, and only takes a few minutes. The cold laser has gained recent FDA approval for the non-surgical treatment of neck and shoulder complaints and is being used widely in the NFL and by the USPS tour de France team chiropractor.