Stamina

Stamina (heart icon counter) is lost with travel (1 per move) or battle (varies based on battle), and lowers your effectiveness in battle. Recuperate with a stay at an Inn in a City, or buy food there to carry with you. If you're broke, stamina recharges on its own (2 per hour in City, doesn't recharge in wilderness until you build an Estate).

Travel stamina costs will be paid by your Mount (horseshoe icon) stamina, which can be recharged by being fed at the Outfitter in any city.