A study from the USA provides an astonishing insight into the connection between nutrition and fitness. The improvement in participants' fitness with better nutrition was similar to the effect of walking 4000 more steps daily.
Study author emphasized that a "Mediterranean diet is a good start" But sport should not be neglected as it is well known that a good combination of sport and nutrition is good for the body and mind. The study was published in April 2023 in the European Journal of Preventive Cardiology. It is not possible to conclude that good diet automatically leads to better fitness.