@erinragancooper: Stop doing 100 boring crunches on the floor. 😴 The secret to burning more calories and locking in your core during home workouts is simply adding instability. Using a half-balance ball forces your stabilizer muscles to fire off on every single movement—whether you’re doing mountain climbers, squat jumps, or basic planks. You get a killer cardio burn and deep core engagement all in one quick routine. #balanceball #coreworkout #bosuball #cardioworkout #cardiocore

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