Physiotherapy is a branch of healthcare science, that mainly concentrates on the physical aspects of an individual's healthcare, by treating their physical ailments. It works towards this by maintenance and rehabilitation of the individual's physical activity, which is nothing but bringing back the lost activity to near normal perfection.Physiotherapy uses physical agents for the treatment of patients. The following list are the common physical agents used in physiotherapy.
| Forms of Energy | Modalities |
| Mechanical Energy | Exercises & Massage |
| Heat Energy | Heat Modalities |
| Electrical Energy | Electrical Appliances used for the treatment |
| Sound Energy | Modality using sound energy |
| Light Energy | Modalities using energy in the form of light |
| Electro-Magnetic Energy | Modality applying electro-magnetic energy |
