Low Plank Knee To Elbow Alternating Sides Tutorial
Low plank knee to elbow alternating sides is a bodyweight core exercise performed from a forearm plank position. From a stable low plank, you draw one knee toward the same-side elbow, then switch sides in a controlled, alternating pattern.
This move strengthens your abs, especially the deep core and obliques, while also challenging shoulder stability and hip control. With a difficulty of 3, it suits intermediate exercisers who already have a solid plank foundation. Focus on keeping your hips level, ribs tucked, and moving slowly enough to stay in control.
Benefits
- Builds strong, stable abs without equipment
- Targets the obliques through same-side movement
- Improves plank endurance and control
- Trains hip mobility while maintaining core tension
- Enhances shoulder and upper body stability
- Helps connect breathing with core bracing
- Useful for sports and general fitness
Setup & Starting Position
Begin by positioning yourself in a low plank on the floor. Place your forearms down with elbows directly under your shoulders. Your forearms should be parallel or slightly angled inward, hands relaxed and pressing lightly into the ground.
Extend both legs straight back with your toes tucked under. Feet should be about hip-width apart to give you a stable base. Your body should form a straight line from the back of your head through your shoulders, hips, and heels.
Gently tuck your pelvis so your lower back is neutral, not arched and not rounded. Draw your ribs down toward your hips and lightly brace your abs as if preparing for a cough.
Quick setup tip: Before starting, press your forearms into the floor and imagine pulling your elbows toward your toes. This activates your core and shoulders immediately.
How To Do Low plank knee to elbow alternating sides (Step-by-step)
- Set up in a stable low plank on your forearms.
- Brace your core and keep your hips level.
- Exhale slightly and lift your left foot off the floor.
- Draw your left knee toward your left elbow without twisting.
- Pause briefly when the knee is closest to the elbow.
- Return the left leg to the starting plank position.
- Reset your brace and inhale gently.
- Lift your right foot and bring the right knee toward the right elbow.
- Keep shoulders steady and neck relaxed.
- Return the right leg to plank.
- Continue alternating sides with control.
- Finish by lowering your knees to the floor and resting.
Form Cues
- Elbows under shoulders
- Hips level and steady
- Knee goes to same-side elbow
- Slow and controlled reps
- Press forearms into floor
- Neck long, eyes down
Breathing & Bracing
Proper breathing helps you maintain tension and avoid sagging or twisting during this exercise. Before each knee drive, take a small inhale through your nose to expand your rib cage without letting your belly drop.
As you bring your knee toward your elbow, exhale slowly through pursed lips. This helps engage your abs and obliques more deeply. Think about gently tightening your core as if you were zipping up tight pants.
Keep breathing continuously rather than holding your breath. A simple rhythm is inhale in plank, exhale as the knee moves forward, inhale again once the foot returns to the floor.
Your brace should feel firm but controlled. The ribs stay stacked over the hips, and the lower back remains neutral throughout the set.
Common Mistakes
- Letting the hips sag, fix by tightening the abs before each rep.
- Twisting the torso toward the knee, fix by keeping shoulders square.
- Rushing the movement, fix by slowing down and pausing briefly.
- Elbows placed too far forward, fix by stacking them under shoulders.
- Neck craned forward, fix by looking down at the floor.
- Holding breath, fix by using a steady exhale on each knee drive.
How It Should Feel
Quick self-check: You should feel strong tension in your abs, especially along the front and sides of your waist. The shoulders and upper arms will work to support your body, and the hips should feel active but controlled.
Good signs:
- Core feels tight and engaged the whole time
- Hips stay mostly level during the movement
- Breathing remains steady and controlled
Warning signs:
- Sharp pain in shoulders, hips, or spine, stop immediately
- Lower back strain or pinching
- Neck tension or headaches
If you feel it mainly in your lower back, reset your plank, shorten the knee range slightly, and focus on bracing before moving. If your neck feels tense, lower your gaze and lengthen the back of your neck.
Alternative Names
Low plank knee drive to elbow, Forearm plank knee to elbow
Variations
Easier
- Low plank knee lift: Lift one knee slightly off the floor without moving it forward, then switch sides.
- Low plank hold: Hold a standard low plank to build baseline strength.
- Low plank knee to elbow with knees down: Keep one knee on the floor for extra support while moving the other.
Harder
- Slow tempo low plank knee to elbow: Take 3 to 4 seconds to bring the knee in and 3 seconds back.
- Low plank knee to elbow with pause: Pause for 2 seconds when the knee is closest to the elbow.
- Low plank knee to opposite elbow: Increase oblique demand by crossing under the body.
Sample Workout
Core Stability Workout
- Low plank knee to elbow alternating sides, 10 reps per side
- Dead bug, 10 reps per side
- Glute bridge, 15 reps
- Side plank, 30 seconds per side
Rest 60 seconds between rounds. Complete 2 to 3 rounds. One rep of the plank knee to elbow equals one left and one right knee drive.
Progression Plan
Week 1: Perform 2 to 3 sets of 6 to 8 controlled reps. Focus on perfect plank alignment, steady breathing, and minimal hip movement. Rest 60 to 90 seconds between sets.
Week 2: Increase to 8 to 10 reps per set. Begin slowing the knee drive slightly, especially on the way back to plank. Keep rest similar or slightly shorter.
Week 3: Add a brief 1 to 2 second pause when the knee reaches the elbow. This increases core tension. Perform 3 sets of 8 to 10 reps.
Week 4: Progress to an advanced variation such as a slower tempo or opposite elbow version if you can maintain form. If form breaks down, repeat the previous week.
Progress only when you can complete all reps with level hips, steady shoulders, and controlled breathing.
FAQ
How many reps should I do?
Start with 6 to 10 reps, where one rep includes both left and right sides.
Should my feet stay together or apart?
Hip-width apart is recommended for better balance and control.
Can I do this every day?
Yes, if volume is moderate and form stays solid, but rest if soreness affects technique.
Why do my hips rock side to side?
This usually means fatigue or lack of core bracing, slow down and shorten the range.
Is this safe for sensitive shoulders?
It can be if done with good alignment, but reduce range or choose a static plank if discomfort appears.
Summary
The low plank knee to elbow alternating sides is a powerful way to build real-world core strength using only your bodyweight. By staying on your forearms and moving one knee at a time, you challenge stability, control, and coordination all at once.
Take your time with each rep, prioritize alignment over speed, and breathe with intention. When performed well, this exercise fits perfectly into core workouts, warm-ups, or conditioning circuits. Stay consistent, progress gradually, and your plank strength will carry over into many other movements.
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