Yes, we practice classical Indian yoga poses, the physical exercises known as Hatha yoga. These traditional asanas have been around for thousands of years. However, humans have evolved, mutated and changed since then.
Our nervous system is different, for one, and we live in the head so much more, two. Not to mention the earth, and how its atmosphere has changed as well. So, to practice yoga, either poses or meditation, as if we can replicate some kind of golden age of enlightenment or recreate an ancient, mystical state-of-being doesn't do much for the modern person.
For instance, 'clearing your mind'. An impossible task as the thing never shuts up with the critiquing, judging, and yah-blah-yip-yap drip of what we should do or what others think or how we need to do-this-to-get-that. Another approach is to ignore the mind when it attempts to interfere (or inter-fear?) and try to run our lives. What is beneficial are higher thoughts, and an ability to guide them and construct them to help create and move through life with clarity and purpose.