Driving those early automobiles took a fair amount of human muscle.

Therefore the actuation rate is slightly better than that of the human muscle.

Small power requirements continued to be provided by animal and human muscle until the late 19th century.

The primary requirement is a boat powered only by human muscle.

Historically, wood fires and human muscles provided the bulk of energy in Canada.

And, with the added exercise, computers, much like human muscles, may offer their owners greater flexibility.

It couldn't lift the metal girders; that took a lot of human muscle working together.

There are a few more than 620 potential trigger points possible in human muscles.

It was not a good job, but no human muscles would ever break out of it.

A subtle tension eased its grip on his human muscles.