There are many protein bars, shakes, snacks geared towards gym goers, suggesting they hold the necessary nutrients for pre or post workout refuelling. For the most part, they contain lots of sugar, are expensive and for most of the population are not required.
Yes, if you are an athlete, you may need some extra supplements or protein and bars can help, but if you are just going to the gym for a workout, no more than an hour, and probably not that intensive, you don’t need any of that.
If you have had a healthy meal or a decent snack (think protein & carbs) an hour before you work out – then you’re fine, no extra needed. Post work out, ensure you have a meal or snack within an hour – protein is important because it will repair muscles worked. An ideal post workout snack (and easily portable) is chocolate milk – it has all the macros and if you’re one of those people who doesn’t feel like eating after the gym, it’s a good option. Just don’t go crazy with your serving size otherwise you’re hard work in the gym is undone in minutes.