No matter the season, abs shouldn’t go untrained—even if you’re not showing off your ripped six-pack. Plus, no one wants a beer belly. Any time is the perfect time to start hammering away at your midsection through HIIT, weight training, and everything in-between, so attack your abs and obliques to build the perfect core with these exercises, workouts, and nutrition tips.

Follow any of these guides for the abs of your dreams.