Grammar 'improve','enhance' and 'sharpen'

[Loh Jane]

Hi English Teachers,
I don’t know when to use ‘improve’, ’enhance’ and ‘sharpen’, please teach me and check my sentences, thanks a lot in advance.
I go jogging frequently nowadays, I thought that the practice enhanced/sharpened my running speed but many people overtook me easily.

 

[emsr2d2]

You can probably make an argument for "enhance" but definitely not for "sharpen". "Improve" is the best option.

 

[riquecohen]

OneLook Dictionary is an excellent resource for this type of question.