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Build Lean Muscle With This 20-Minute Ab, Butt, and Leg Workout by Brittany Watts
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Circuit 1, Exercise 1: High Knees

  • Start standing with your feet slightly further than shoulder-width distance apart.
  • Keeping the weight on your left foot, bend your right leg to bring your knee into your chest.
  • Lower your right leg and plant your foot on the floor. Keeping your weight on the right leg, bend your left leg to bring your knee into your chest.
  • Once you are comfortable with this movement, increase your speed so that you are hopping from one foot to the other.
  • Repeat for 30 seconds.
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