Regular exercise is necessary as part of a healthy lifestyle, but can it prevent hair loss? Maybe. Exercise helps to increase circulation, which may help keep your scalp healthier and in turn help prevent certain types of hair loss. People who exercise also tend to drink more water, which also contributes to overall hair and skin health. Exercise by itself will not necessarily prevent hair loss, but it may help in keeping yourself and your hair healthy. Those who wear hats or tie their hair back while exercising may find that there is an increase in hair thinning due to tight hair-elastic or hats. If you think that your hat or hair elastic is causing damage to your hair, consider loosing the band of your hat or braiding your hair.