It seems like a good portion of what looks like aging is a de-training effect combined with lifestyle factors that de-prioritise training and performance - but not aging itself. Much of the ageing effect can be significantly reduced with systemised and smart training.

At the start of the race, to get the boat moving from its stationary position you have to apply FORCE...

Between ground contact and the mid stance phase of each stride the calf works isometrically and so the calf should be trained accordingly.