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Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
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15.03.2011 |
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Fancy footwork gives calves a better workout
Bodybuilders looking for bigger calves may get better results by doing their calf-raises alternately with their toes turned out and turned in. Sports scientists from Armstrong Atlantic State University have published their findings in the Journal of Strength and Conditioning Research.
The researchers did experiments with 10 male and 10 female subjects in their mid-twenties. The subjects had to do calf-raises while carrying a bar with weights across their shoulders. The combined weight of the bar and weights was 130 to 150 percent of their bodyweight.
The researchers placed electrodes on the medial and lateral head of the gastrocnemius muscle. This enabled them to measure how hard the calf muscles had to work.
The subjects did their free-weight calf-raise in the classical way [Neutral], but also with their toes turned inwards [Internal rotation, left-hand photo below] and with their toes turned outwards [External rotation, right-hand photo].
The figure immediately below shows the muscle activity during the concentric movement – as the subjects push the weight upwards. The lower figure shows the activity during the eccentric movement. The light bars represent the lateral head and the black bars the medial head of the gastrocnemius.
The graphs indicate that during the concentric phase you stimulate the lateral head more if your toes are turned inwards. During the eccentric phase you stimulate the medial head better if your feet are turned outwards. And before you ask: yes, the differences are statistically significant.
The researchers didn't measure the extent to which the different ways of doing the calf-raise actually result in stronger or bigger calves.
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