Triple extension activation using the MyoTruk accommodating resistance strength builder

The key factor in a sprint start is achieving triple extension out of the blocks, that is, extending the ankle knee and hip joints simultaneously. The same combination is required in the vertical jump.

The main resistance exercises used to train triple extension are Olympic lifts, i.e., the snatch and clean. However there is very limited movement of the ankle joint in these lifts. Only a moderate degree of plantar flexion is involved whereas in a sprint takeoff or a vertical leap the gastrocnemius and soleus muscles are strongly and fully activated.

The MyoTruk accommodating resistance strength builder provides an alternative and more effective method of training for triple extension. As this video makes clear full range plantar flexion is automatically achieved in the exercise movement. It is also possible to train triple extension in each leg separately.

A further advantage of the MyoTruk is that its operation is intuitive. By contrast the Olympic lifts are very much learned movements which take considerable time to master.