Planks but those will all train obliques. But if you’re just looking for a flat tummy, planks will do the trick

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EAT PROTEIN LIKE A LOT OF IT

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there is no way to reduce fat in one specific area. but if you want to lose fat overall you’d want a calorie deficit, increase your activity levels so it’s easier to be in a calorie deficit, and eat a low glycemic index diet. glucosegoddess has a lot of tips for that

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in the end, a slight caloric deficit and my routine that has shown me abs w/o weights is 30 heel taps, 30 suitcases, 1:15 leg lifts, 30 dead bugs. doing that twice at least two times weekly gives the best results

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