1. Russian Twist
Routine: The Russian Twist targets the obliques, transverse abdominus, rectus abdominus, and multifidus. This exercise can be done with or without weight, depending on the difficulty level you are trying to achieve. Sit on glutes with feet raised up, then twist side to side with or without a weight (like a medicine ball).
Doing 3 sets of 10-20 repetitions will get a good burn in the muscles and a great workout. Use weight to increase difficulty.
2. Standing Oblique Crunch
Routine: The Standing Oblique Crunch targets the obliques, transverse abdominus, multifidus, and rectus abdominus. Being that this is a standing exercise, it makes your muscles activate to stabilize the body when balancing on one foot to lift the leg to crunch.
Depending on the difficulty level you wish to achieve, lift one leg and keep it lifted throughout 10-20 repetitions, then switch sides. If you wish the difficulty level to be lower, tap the lifting foot down between repetitions. Do 3 sets on each side.
Routine: Burpees are a combination cardio/strengthening exercise. This exercise targets the triceps, shoulders, upper back, abdominals and legs. Therefore, this is considered a full-body exercise and can be very beneficial to tone up all over. The more you focus on proper form and technique, the more your muscles will benefit from this exercise.
Do 10-20 repetitions and 3 sets. Increase difficulty by doing more repetitions with less rest in between sets.
4. Scissors Abdominal Exercise
Routine: The Scissor Exercise targets all the stabilizing muscles of the trunk and activates the leg muscles to produce movement to challenge the core. In the video, the legs cross over each other (make sure to alternate legs that cross on top), and a second option for the exercise is legs alternating going straight up and down.
Both exercises can challenge the body and try doing 10-20 repetitions and 3 sets.