Especially monks and nuns do prostrations as part of their prayer rule. Some do hunderds, some do even thousands prostrations during their prayers. We use prayer rope when recitating Jesus Prayer[1]. Prayer rope helps count the prayers but also it gives your hands something to do while praying, so it's easier to focus. I usually have one in my pocket and I roll it in my hands secretly while in meetings or sometimes even during typing code. I don't really pray then but it reminds me of the spiritual reality and that my boring Teams-meetings and stupid Jira-tickets aren't the purpose of my life ;)

1: https://en.wikipedia.org/wiki/Jesus_Prayer

The widespread use of the prayer rope with jesus prayer in orthodoxy is very recent, like second half of 20th century. Both things are ancient but the rope was more associated with monastics and some specific balkan regions where they were popular. The jesus prayer has been common but the modern hesychastic application of it was basically practiced only by monks until JD salinger made the way of the pilgrim popular.

You hear about this practice a lot on the internet and it is very familiar to english-speaking converts but this practice is not typical among for example greeks christians in greece, or even most russians I don't think but I'm less clear on that.