CHOOSING which trainers are best for your gym workout can depend on a few different factors.
Are you mostly using the cardio machines? Are you there for the HIIT classes, or purely for the strength training?
Or do you like a bit of everything? The different disciplines require a slightly different sort of gym trainer.
For treadmill lovers, a lightweight running-specific shoe is probably best, whereas, for strength training, particularly leg day, you want something with a flatter sole to provide stability.