Tell me please which phrasing sounds natural in the following context.
The method of training I used with my client/I applied to my client was pretty challenging.
Would it be more grammatical and native to say ...I used to train... or ...I applied to train...? If the second options are more correct and native, however longer, then which verb sounds more natural?
You would use or apply methods with a client, and apply methods to your training.
We can apply methods to an intangible thing such as a training regimen or an approach to doing something; we adapt the methods to the regimen or modify the approach in some way to accommodate the methods.
I applied these methods to my strength-building exercise regimen.
You could also say
I applied these methods with John, my client.
And there, "with John" would be understood to mean "in the training regimen I have set up for John".
