What are the two main types of muscle contractions observed in canine physical therapy?

The two main types of muscle contractions relevant in canine physical therapy are isometric and isotonic contractions.

Isometric contractions occur when the muscle exerts force without changing its length. This is particularly useful in physical therapy settings because it helps in maintaining muscle strength and stability without joint movement, which is important for dogs recovering from injuries or surgeries. These contractions allow for strengthening the muscles while minimizing stress on the joints, making them ideal for rehabilitation.

Isotonic contractions involve the muscle changing length while generating force, which can be further divided into two categories: concentric (muscle shortening) and eccentric (muscle lengthening). While isotonic contractions are essential in providing a well-rounded rehabilitation program, the term "isotonic" itself encompasses both concentric and eccentric actions, making it a broader category.

Selecting isometric and isotonic as the main types captures the essential nature of muscle function and therapy application in canines, ensuring a comprehensive approach to rehabilitation.