Due to the current lockdown that we are stuck in, we have to use our imaginations when it comes to staying in shape and getting exercise, especially if you don’t have a garden where you can stretch your legs and clear your head. As we have already explained above, we've got the perfect core exercise for you.Focus on the absFor this workout, we are going to be focusing on our abs with three quick, simple and easy exercises that will strengthen and tone your abdominal belt.- Sit-ups (12 reps): Sit down with the soles of your feet firmly glued together and slowly lower the top half of your body down to the floor while tensing your core. Then raise yourself back up, keeping your arms tensed and stretched out in front of you in order to put all the work into your abs.- Diagonal mountain climbers (10 reps per leg): Once again, this exercise will work your abs in a static position and the movement is simple. Place yourself in a plank position and lift your knees up to cross in front of your chest. This exercise is very effective and will work your internal and external obliques to create that precious V-shaped torso you have always wanted.- Swiss ball (45-second intervals): This very effective exercise works both your abs and your abdominal sleeve. Position your forearms on a Swiss ball, or any other unstable, round object, and make circles with it. The imbalance and effort required to keep yourself stable works all of your abdominal area so you get that definition.Repeat the circuit 4 times! Sweating yet?