Weight Lifting, Weight Training, Bench Press & Bodybuilding
Weight Lifting Workouts Muscle Stories Weight Training Build Muscle Muscle Building Strength Training Fitness Pics Discount Supplements Fitness Equipment Health and Fitness Links
September 21, 2019

Abdominal Exercise: Jack Knives

Jack Knives Exercise Example VideoPrimary Muscle

Lower and Upper Abs

Secondary Muscles

Obliques - Hip Flexors

Equipment Needed

Flat Bench

Mechanics Type

Isolation

Proper Exercise Technique



Sit across a flat bench with your upperbody leaning back and your legs fully extended out in front of you. Place your hands on the front of the bench to secure your body in place. With your lower back rounded, bring your upper body forward and simultaneously curl your legs in until your knees are touching your chest. Squeeze your abs in this position and then return back to the starting position.

Make sure to keep your lower back rounded as you perform your reps rather than arched. It is also very important to keep the tension on your abs throughout the entire exercise by not allowing yourself to rest at any point and by utilizing a complete range of motion.

Jack Knives Exercise - Start Position

Jack Knives exercise

Jack Knives Exercise - Finish Position

Jack Knives exercise

Jack Knives Exercise Video

 

Jack Knives Exercise Abdominal Video

 

 

Return to the Exercise Database - Exercise Video Guide

More Abdominal Exercises

More Body Weight Exercises

 



 





Natural Bodybuilding | Growth Factor-1 | Discount Bodybuilding Supplements | Gain Weight Fast | Big Arms | How To Get Ripped
Weight Lifting Programs | Weight Lifting Equipment | Weight Training Articles | Weight Lifting Workouts | Workout Routines
Bench Press Routine | Bench Press Workout | Increase Bench Press | Bench Press Records | Bench Press Chart
Lean Body Mass | How To Run Faster | Bodybuilding Tips | Athlete Celebrity Interviews | Muscle Growth Stories
Muscular System | Healthy Bodybuilding Recipes | Muscle Man | Female Bodybuilders | Weight Lifting Exercises
Powerlifting | Dumbbell Exercise | Muscle Bodybuilding T Shirts | Vince Gironda | Vince Delmonte | Jennifer Nicole Lee
Weight Lifting Accessory | Football Strength Workout | Strongman Training | Weight Lifting Belts | Mike Geary
Bench Press | Fitness Links | How To Gain Weight Fast | Strength Blog | Build Muscle Fast | Workout Reviews | Workout Videos
Weight Lifting & Weight Training Tips For Building Muscle Strength
 
Fitness Models | Strongman | Muscle Building Nutrition | Muscle Growth | Muscle Building Experts

Supplements: Testosterone Booster | Super Fat Burner | Beta Alanine | Creatine Caps | Nitric Oxide NO2 | Muscle Building Supplements | Post Workout Supplement

Articles: Bench Press Tips | Supplement Reviews | Muscular Strength | Bodybuilding Nutrition | Fitness Health | Muscle Building
Fat Loss Tips