Someone who is perfectly healthy can injure themselves when exercising, let alone someone who is malnourished. Malnourishment can be caused by not eating enough, or not eating the right foods. Your body regularly needs the right nutrients in order to function, focus, be strong, and be healthy. This is especially in regards to fitness, so that you don’t faint, collapse, break a bone, etc. The healthiest diet journeys begin with what you PUT into your body, then what you DO with your body.