The effects of training triceps surae using progressive speed loading

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Abstract
The effects of training with simple speed loading to triceps surae was studied in healthy, normal subjects. A total of 15 subjects formed the experimental group and 13 served as the control group. After 4 weeks of a progressive increase in speed of heel raise with body weight as the constant load, there was a significant increase in the measured jumping height of the experimental group (P < 0.001). No change was found in the isokinetic peak torque measurements made at an angular velocity of 180 degrees/second. However, the static strength of soleus decreased significantly in the experimental group (P <0.05). An improvement in muscle power was therefore only shown in the jump test and not in the isokinetic measurement, which suggests the specificity of improvement to the training programme. The significant decrease in the isometric strength of soleus after training suggests that high-speed repetitive exercise may possibly inhibit the static actions of this muscle.