Don't know if this is the right place or not, but I'll ask anyway. After many, many years of being inactive, I'm about to join our local leisure centre gym. I'm not young, so am out of the loop on what to wear on my feet. I'm sure leggings and t-shirt are fine, but what do I wear on my feet? I have several pairs of trainers for walking about in (photo attached) - would these be suitable for working out in?