4-week challenge that can help you sculpt your arms

#5. Knee Push-Ups

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– Start in the same position as a push-up, and keep your knees in contact with the floor as you press up, lifting your upper body.

– Keeping your knees on the floor reduces the total weight you need to lift to complete the motion, while still retaining many of the push-up’s benefits.

#6. Backside-Boosting Lunge

How to Do a Curtsy Lunge | POPSUGAR Fitness

– Start from standing, and step your left leg behind you and to the right so your thighs cross, bending both knees as if you were curtsying.

– Make sure your front knee is aligned with your front ankle.

– Return to standing, and switch sides to complete one rep.

#7. Plank Knee to Elbow

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– Start in a plank position with your hands underneath your shoulders and your back flat.

– Pull your knee up to your elbow and fully contact your obliques.

– Alternate sides.

#8. Leg Raises

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– Place yourself on your hands knees on an exercise mat.

– Your head should be looking forward and the bend of the knees should create a 90-degree angle between the hamstrings and the calves. This will be your starting position.

– Extend one leg up and behind you. The knee and hip should both extend. Repeat for 5-10 repetitions, and then switch sides.