Eccentric exercises have been designed to strengthen the tendon and non-contracting muscles. The proven effect of this is that it helps swollen tendons return to normal, thereby alleviating tendonitis.

Why are eccentric exercises good for tendinopathy?

It is likely that the calf muscle is able to shield the tendon to avoid excessive loading during walking or sports. Improved strength and coordination through eccentric exercise also appears to coordinate and smooth muscle contractions in the calf thereby decreased asymmetrical loading patterns on the tendon.

Why do eccentric exercises work?

Studies have shown that eccentric exercises improve the capacity of the tendon unit load, which leads to an improved ability to adapt to load. Improving the capacity of the tendon will help decrease tendinopathy injuries. The reason we want stiffness is that it allows your tendon to withstand high loads.