COHORT CAPACITY: 94% FULL
|
Only 4 Spots Left

Free Calorie Meal Plans & Metabolic Science

Reviewed by Matt, NASM CPT
Free Tool

Is Your Metabolism Slow or "Stuck"?

Take our 60-second audit to see if hormonal resistance is blocking your results.

Prone Stability Ball Single Straight Leg Jackknifes

Strength Advanced

How to Do

How to Do Prone Stability Ball Single Straight Leg Jackknifes

The prone stability ball single straight leg jackknifes should begin with good posture to avoid injury. Brace the spine by drawing your lower abdomen inward. Your core muscles should be activated to support your posture as you perform the exercise.

If any pain is experienced, immediately stop the prone stability ball single straight leg jackknifes.

Beginning

Beginning Single Straight Leg Jackknifes

Begin on your stomach, with your legs straight and your hands and toes touching the floor, on a stability ball.

Movement

Single Straight Leg Jackknifes Movement

1. Balance your weight on the ball with your arms and upper abs.

2. To help elevate your legs into a prone position, contract your buttocks and core.

3. Before returning to the raised position, pause for a second.

4. Repeat.

Benefits

Single Straight Leg Jackknifes Benefits

The single-leg jackknife is a calisthenics and pilates exercise that primarily targets the abs, but also the hamstrings, hip flexors, and lower back to a lesser extent.

Exercise Aliases

Straight Leg Jackknifes, Straight Leg Stretch.

Prone Stability Ball Jackknife Push Up With Bent Knees, Get My Free Fitness App

Start your exercise now!

Prone Stability Ball Single Leg Jackknife Push Up With Bent Knees Exercise, Get My Free Fitness App

Start your exercise now!

Prone Stability Ball Jackknife With Bent Knees

Start your exercise now!

Prone Stability Ball Single Bent Leg Jackknife

Start your exercise now!

Prone Stability Ball Straight Leg Jackknifes

Start your exercise now!

Research Corner

Clinical Data
Journal of Cardiovascular Nursing

📚 Coaching Delivers 4.73 lbs MORE Weight Loss

Research proves that combining coaching with app-based programs results in significantly greater weight loss than apps alone.

Breakthrough Study (July 2025)
Duke University (PNAS)

"You Can't Outrun a Bad Diet"

90% of obesity is driven by diet, not lack of movement. Your body has a "Metabolic Thermostat." When you exercise more, it burns less energy elsewhere to keep you stable.

Founder Offer

This Plan is Generic. You Need Specific.

This sample menu works for an "average" person. But you aren't average. Your hormonal profile, weight history, and activity level require exact macro targets to work.

Get your personalized plan + 1-on-1 coaching to adjust it as you progress.

GET MY CUSTOM PLAN (SAVE $400)
TAKING NEW CLIENTS
OPEN

89%
Retention Rate

When paired with a human coach.

Verified by Journal of Cardiovascular Nursing
BEFORE
AFTER
VERIFIED LEGACY MEMBER
Sean Flora
Lost 40 lbs
Join 13 others analyzing now...

DOES THIS SOUND LIKE YOU?

"I am eating the same (or less) than I did 5 years ago, but my midsection is getting larger."

We hear this from 93% of our members. This is a classic sign of Insulin Resistance. Your audit will confirm this.
START FREE METABOLIC AUDIT ➜
Takes 60 seconds • No credit card required