Weighted Leg Extension Crunch – Video Exercise Guide & Tips

Weighted Leg Extension Crunch - Video Exercise Guide & Tips

Are you looking for a challenging exercise to target your abs and legs? Look no further than the weighted leg extension crunch!

Watch This Exercise Video

This exercise combines the benefits of a traditional crunch with the added resistance of weights.

In this video exercise guide, we'll show you the proper form and technique, equipment and weight selection, modifications and progressions, and common mistakes to avoid.

Get ready to take your core workout to the next level with the weighted leg extension crunch!

Key Takeaways

  • Weighted leg extension crunch targets multiple abdominal muscles, hip flexors, and strengthens the core.
  • It can improve strength, stability, and athletic performance for running and jumping.
  • Proper form and technique, including engaging the abs and maintaining proper alignment, are crucial for effectiveness and safety.
  • Modifications and progressions, such as using a stability ball or increasing weight, can be implemented to challenge and advance the exercise.

Benefits of Weighted Leg Extension Crunch

Discover the numerous benefits of the weighted leg extension crunch exercise. This exercise is highly effective for muscle activation and targets several key areas of your body. By performing this exercise, you can engage your abdominal muscles, including the rectus abdominis, obliques, and transverse abdominis, leading to a stronger core.

In addition to targeting your abs, the weighted leg extension crunch also activates your hip flexors, which are responsible for lifting your legs towards your torso. This exercise can help improve the strength and stability of your hip flexor muscles, which can be beneficial for activities such as running and jumping.

Furthermore, the weighted leg extension crunch can be integrated with other exercises to create a full-body workout. For example, you can combine it with exercises like squats or lunges to engage your lower body muscles while also targeting your core. By incorporating compound movements, you can maximize your workout efficiency and save time.

Proper Form and Technique

To perform the weighted leg extension crunch with proper form and technique, you need to ensure that you engage your abdominal muscles and maintain proper alignment throughout the exercise. Core stability is crucial in this exercise, as it helps protect your lower back and maintain control throughout the movement.

To engage your core, start by lying flat on your back with your legs bent and feet flat on the floor. Place a weight plate on your chest, holding it securely with both hands. As you lift your legs up towards the ceiling, simultaneously lift your upper body off the ground, crunching towards your legs.

Make sure to keep your lower back pressed into the floor, and avoid using momentum to swing your legs up. This exercise targets the muscles of your core, including your rectus abdominis, obliques, and hip flexors.

Equipment and Weight Selection

Choose appropriate equipment and weights for the weighted leg extension crunch exercise. It's crucial to have the right equipment options and weight selection to maximize the effectiveness of this exercise and prevent injury. Here are some important considerations:

  • Weighted vest or ankle weights: A weighted vest or ankle weights can be used to add resistance and increase the intensity of the exercise.
  • Dumbbells or kettlebells: Holding dumbbells or kettlebells can also provide added resistance to challenge your muscles during the leg extension crunch.
  • Exercise mat: Using an exercise mat can provide comfort and support for your back and prevent any discomfort or strain while performing the exercise.
  • Proper warm-up: Before starting the weighted leg extension crunch, it's essential to properly warm up your body. This can be done through dynamic stretches and light cardio exercises to increase blood flow and prepare your muscles for the workout.
  • Progressive weight increase: Start with lighter weights and gradually increase the weight as your strength and endurance improve. This will help you avoid straining your muscles and allow for steady progress over time.

Remember to always listen to your body and choose weights and equipment that challenge you without causing pain or discomfort. Proper warm-up and gradual progression will ensure a safe and effective workout.

Modifications and Progressions

Make modifications and progressions to challenge yourself and continue to improve in the weighted leg extension crunch exercise. By making modifications to the exercise, you can target different muscle groups and increase the difficulty level.

One modification you can try is adding a stability ball under your lower back. This will engage your core muscles even more and increase the range of motion in the exercise.

Another modification is to increase the weight you're using. Gradually adding more weight will help you build strength and endurance in your abdominal muscles.

For advanced variations of the weighted leg extension crunch, you can try incorporating a twist or a side plank. Adding a twist to the exercise will engage your obliques and provide a greater challenge for your core muscles. To do this, simply rotate your torso to the left or right as you extend your legs.

Another advanced variation is to perform the leg extension crunch from a side plank position. This won't only target your abdominal muscles but also engage your shoulder and hip stabilizers. Start in a side plank position, then extend your legs out in front of you while crunching your upper body towards your legs.

Incorporating modifications and advanced variations into your weighted leg extension crunch routine will help you continue to challenge yourself and make progress in your fitness journey.

Remember to listen to your body and start with modifications that are appropriate for your fitness level. As you get stronger, gradually progress to more advanced variations to keep pushing yourself and achieving new goals.

Common Mistakes to Avoid

As you progress in the weighted leg extension crunch exercise, it's important to be aware of common mistakes that can hinder your progress and potentially lead to injury. To ensure you're getting the most out of this exercise while minimizing the risk of injury, here are some common mistakes to avoid and tips for proper alignment:

  • Using too much weight: One of the most common mistakes is using excessive weight, which can strain your lower back and compromise your form. Start with a weight that challenges you but allows you to maintain proper form throughout the movement.
  • Lifting your hips off the ground: To effectively engage your core muscles, it's crucial to keep your hips firmly planted on the ground throughout the exercise. Lifting your hips can place unnecessary stress on your lower back and diminish the effectiveness of the exercise.
  • Rushing the movement: Another mistake is performing the leg extension crunch too quickly. This can lead to using momentum instead of engaging your abdominal muscles. Take your time and focus on the quality of each repetition.
  • Neglecting proper spinal alignment: It's essential to maintain a neutral spine throughout the exercise. Avoid arching your back or tucking your chin into your chest. Keep your spine in a straight line from your head to your tailbone.
  • Not breathing properly: Breathing is often overlooked, but it's crucial for maintaining stability and engaging your core. Exhale as you crunch up and inhale as you lower yourself back down.

Frequently Asked Questions

How Many Sets and Reps Should I Do for Weighted Leg Extension Crunches?

To determine the number of sets and reps for weighted leg extension crunches, it's important to consider your fitness goals and current fitness level.

Generally, a good starting point is to perform 2-3 sets of 10-15 reps.

However, you can increase the intensity by adding more weight or incorporating variations of the exercise, such as single-leg or decline leg extension crunches.

Remember to listen to your body and gradually increase the sets and reps as you get stronger.

Can I Do Weighted Leg Extension Crunches if I Have Lower Back Pain?

If you have lower back pain, it's important to be cautious with weighted leg extension crunches. This exercise can put strain on your lower back, so modifications may be necessary.

It's recommended to consult with a healthcare professional or a qualified trainer who can provide guidance on how to modify the exercise to suit your needs. They can also suggest alternative exercises that target the same muscle groups without exacerbating your lower back pain.

Safety and proper form are key when dealing with any kind of discomfort or injury.

Is It Better to Do Weighted Leg Extension Crunches With a Machine or With Free Weights?

When deciding between using a machine or free weights for weighted leg extension crunches, consider the benefits of each.

Using a machine can provide stability and support, making it easier to maintain proper form.

On the other hand, using free weights engages more muscles for balance and stability, leading to a more challenging workout.

Ultimately, the choice depends on your preferences and fitness goals.

How Often Should I Incorporate Weighted Leg Extension Crunches Into My Workout Routine?

To maximize the benefits of weighted leg extension crunches, you should incorporate them into your workout routine regularly. The frequency of these exercises will depend on your overall fitness goals and current level of strength.

However, a general recommendation is to perform them 2-3 times per week. By consistently including weighted leg extension crunches in your routine, you can strengthen your core muscles, improve stability, and enhance your overall athletic performance.

Are There Any Alternative Exercises That Target the Same Muscles as Weighted Leg Extension Crunches?

If you're looking for alternative exercises that target the same muscles as weighted leg extension crunches, there are a few options to consider.

One option is the lying leg raise, which works the same muscles but without the added weight.

Another option is the reverse crunch, which also targets the abdominal muscles.

Additionally, you can try the hanging leg raise or the Russian twist to further engage and target your core muscles.


In conclusion, the weighted leg extension crunch is a valuable exercise that offers numerous benefits. It strengthens the core muscles and improves overall stability.

By following proper form and technique, selecting the appropriate weight and equipment, and avoiding common mistakes, you can maximize the effectiveness of this exercise.

Whether you're a beginner or advanced, there are modifications and progressions available to suit your fitness level.

Incorporate the weighted leg extension crunch into your workout routine for optimal results.

workout guru author


Serg Bayracny

Years ago, the spark of my life’s passion ignited in my mind the moment I stepped into the local gym for the first time. The inaugural bead of perspiration, the initial endeavor, the very first surge of endorphins, and a sense of pride that washed over me post-workout marked the beginning of my deep-seated interest in strength sports, fitness, and sports nutrition. This very curiosity blossomed rapidly into a profound fascination, propelling me to earn a Master’s degree in Physical Education from the Academy of Physical Education in Krakow, followed by a Sports Manager diploma from the Jagiellonian University. My journey of growth led me to gain more specialized qualifications, such as being a certified personal trainer with a focus on sports dietetics, a lifeguard, and an instructor for wellness and corrective gymnastics. Theoretical knowledge paired seamlessly with practical experience, reinforcing my belief that the transformation of individuals under my guidance was also a reflection of my personal growth. This belief holds true even today. Each day, I strive to push the boundaries and explore new realms. These realms gently elevate me to greater heights. The unique combination of passion for my field and the continuous quest for growth fuels my drive to break new ground.

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