What's a rest day and how do I flex it? by Flex Comics Jeremy AgapitosFeb 28, 2016 Share We all have to learn... SOCIAL MEDIA SHARE SQUARE Use code: Flexcomics at MetabolicNutrition.com for 20% off your order. Share Previous articleNext article Join Us A short sentence describing what someone will receive by subscribing Your email Subscribe100% free, Unsubscribe any time! Follow us