I am trying to design a species. Members of these species can run most efficiently in quadrupedal. If possible, they should press on their palms, not knuckles.
They can also walk upright like humans do in bipedal form. They can use their hands skillfully like humans do. Their upright posture shouldn't be so different from humans. Also their upright height must be somewhat close to human height.
What should I regard when designing such a species? I realized that bone and muscle structure, also the body proportions have a big effect on how a species walk and run. I am looking for science based answers and real life examples.