HIIT exercises are a great way to build abs in a short amount of time.
The first exercise is the mountain climber, which involves bringing your knees to your chest while in a plank position.
The second exercise is the Russian twist, which involves twisting your torso while holding a weight or medicine ball.
The third exercise is the plank jack, which involves jumping your feet in and out while in a plank position.
The fourth exercise is the bicycle crunch, which involves bringing your elbow to your opposite knee while lying on your back.
The fifth exercise is the burpee, which involves jumping up from a plank position and then jumping back down.
The sixth exercise is the side plank, which involves holding a plank position on your side.
The seventh exercise is the reverse crunch, which involves lifting your hips off the ground while lying on your back.
The eighth exercise is the jumping jack, which involves jumping your feet in and out while standing up.