The latest trend, according to users at TikTok, is eating rice crispy before exercise.

Is it a good idea? Short answer: Of course it can be. According to Audra Wilson, a nutritionist by profession, simple carbohydrates (think: toast, cereals and granules) are a really good source of pre-workout energy.

Carbohydrates allow energy to go directly into the bloodstream.

However, rice crispies are suitable for people who are going to do cardio or train with heavy weights, but not necessarily for those who are going to do a casual bike ride or walk.