4196 - Instead of afflicting your body with fasting, why not afflict your animal soul.

Refrain from indulging in food and drink, or speaking frivolously. Abstain from speaking loshon hora or harming others. Fulfill the mitzvah of loving your fellow, even if you imagine they have harmed you or tarnished your honor. These tasks may be more challenging than simply not eating, but they do not affect your health. https://www.torahrecordings.com/rebbe/igroskodesh/012/007/4196