V-Ups Exercise: Proper Form, Benefits, Muscles Worked & Core Strength Guide

Many people think the abs are just one single muscle, so they only do exercises like crunches. But in reality, your abs have two main parts: the upper abs and the lower abs. Crunches mainly work the upper abs, but to strengthen and define the lower abs, you need exercises that involve lifting your legs and engaging your hip flexors.

Training both the upper and lower abs is important to build a stronger, tighter, and more defined core. One of the best exercises that works both areas at the same time is the V-Ups exercise, also called the jackknife.

Table of Contents

How to Do V-Ups Exercise (Step-by-Step Guide)

Lie Down Properly: Lie flat on your back. Keep your legs straight and arms extended overhead. Tighten your core.
Lift Your Body and Legs Together: Slowly lift your upper body and legs at the same time. Try to bring your hands toward your feet.
Form a “V” Shape: At the top position, your body should look like a “V”. Balance on your hips and squeeze your abs.
Lower Slowly: Slowly lower your arms and legs back to the starting position. Keep control and do not drop fast.
Repeat: Repeat for 10–15 reps and focus on using your abs, not momentum.

Breathing Tip:

Breathe out when lifting up
Breathe in when lowering down

Beginner Tip: If it’s too difficult, bend your knees slightly or lift one leg at a time.

Exercise Notes: V-Ups Exercise

Start in a hollow body position with your arms and legs fully extended. Stretch your body as much as possible.
Slowly lift your arms and legs together to form a V shape, and try to touch your toes if possible.
Focus on using your abdominal muscles to lift your torso and legs, not momentum.
Keep the movement slow and controlled. Do not jerk your body up.
Do not fully rest your arms and legs on the floor between reps. Keep tension on your abs.
At the top position, squeeze your abs and hold for 1–2 seconds for better muscle activation.
Concentrate on feeling your abs working throughout the entire movement.
If the full V-Up is too difficult, you can do the bent-knee version, which is easier and puts less pressure on your lower back.

V-Ups Exercise Muscles Worked

Usually, upper abs work more when your legs stay still and your upper body moves toward your legs, like in crunches. Lower abs work more when your upper body stays still and your legs move toward your chest, like in leg raises.

In the V-Ups exercise, both your legs and upper body lift at the same time. Because of this, V-Ups work both the upper and lower abdominal muscles equally, especially the rectus abdominis, which is the main six-pack muscle.

Main muscles worked:

Rectus abdominis (upper and lower abs)

Secondary muscles worked:

Hip flexors
Obliques (side abs)
Transverse abdominis (deep core muscle)

This makes V-Ups exercise a complete exercise for building strong and defined abs.

V-Ups Exercise Benefits

Strengthens Entire Abdominal Muscles: V-Ups work both the upper and lower abs at the same time, helping you build a stronger and more defined core.
Builds Six-Pack Abs: This exercise directly targets the rectus abdominis, which helps develop visible six-pack abs.
Improves Core Stability: A stronger core improves balance, stability, and performance in other exercises and daily activities.
Targets Multiple Muscles at Once: V-Ups engage not only the abs but also the hip flexors and deep core muscles, making it a highly effective core exercise.
Enhances Muscle Coordination: Lifting your arms and legs together improves coordination and control between your upper and lower body.
No Equipment Needed: It is a bodyweight exercise, so you can do it anywhere—at home, gym, or while traveling.
Helps Improve Athletic Performance: A strong core supports better performance in sports, running, and strength training.
Improves Core Definition and Toning: Regular practice helps tighten and tone your midsection for a lean and aesthetic look.

Read More: Standing Side Bend Exercise: Proper Form, Muscles Worked & Benefits

Conclusion

The V-Ups exercise is a powerful core movement that targets both the upper and lower abdominal muscles at the same time. It helps build stronger, more defined abs and improves overall core stability and control. Because it works multiple muscles in one movement, it is highly effective for developing a lean and well-balanced midsection.

By performing V-Ups with proper form and controlled movement, you can improve core strength, enhance muscle definition, and support better performance in other exercises. Add V-Ups to your regular ab workout routine to build a stronger, tighter, and more defined core.