"Training modalities" refers to the different methods or techniques used to teach or learn something. It just means the various ways in which training can be conducted or approached. Full definition
To be a well rounded individual that lives an active and healthy life with minimal injuries, you must work the body from different training modalities. (weckmethod.com)
I use them as a stand alone tool or in conjunction with other training modalities. (marksdailyapple.com)
Consider the needs and experiences of your employees and let your content guide you to the most effective training modalities. (elearningindustry.com)