Crunches
Learn Crunches for full body with step-by-step Flexor cues.
Overview
Crunches is an intermediate mobility exercise on Flexor that mobilizes the core and glutes. A controlled exercise focusing on core to improve movement quality and body control.
What Crunches targets
You'll feel it most through the gluteus maximus, working the core and glutes.
Why add Crunches to your routine
Enhances trunk stiffness and pelvic control to support the spine during movement. Done regularly, small comfortable reps add up faster than occasional forced ones.
- Targeted, controlled work through the core and glutes.
- An intermediate-friendly movement you can repeat with no equipment.
Who it's for
It works well once the basics feel comfortable and you want more range or control, and it carries over well to activities like athletics.
When to do it
Fit it into a warm-up, a cool-down, or a standalone mobility break whenever the area feels tight. Most people spend around 45 seconds on it.
Crunches is a movement exercise that targets the deep core (abdominals), glutes, and spinal stabilizers. Use smooth, controlled effort and stop short of sharp pain. For stretching-based movements, aim for a mild-to-moderate pull and hold steadily; for strength/isometric movements, keep alignment rigid and braced. This makes it useful for warm-ups, cool-downs, and mobility routines, and it can help AI match the exercise to goals like improving range-of-motion, reducing stiffness, building stability, or preparing for training.
Setup cue
Lie on your back with knees bent, feet flat, and fingertips lightly behind your head or across your chest. Exhale to curl shoulder blades off the floor while keeping the low back heavy.
Practice notes
In Flexor, Crunches is typically prescribed as about 45 sec per round, 1 rep, and 1 set. Adjust the dosage to what feels sustainable, breathe steadily, and ease off if anything feels sharp or unsafe.
Guidance
How to perform, tips, mistakes, safety notes, and benefits for Crunches.
Follow these cues in order. Move with control and stay in a comfortable range.
- Lie on your back with knees bent, feet flat, and fingertips lightly behind your head or across your chest.
- Exhale to curl shoulder blades off the floor while keeping the low back heavy.
- Pause briefly at the top without pulling on your neck.
- Inhale to lower with control and repeat.
Cues that help the movement stay smoother and more controlled.
- Move with control and keep breathing steadily.
- Maintain stable posture; avoid compensating with other joints.
Patterns to watch for so the shape stays clearer.
- Rushing through reps or forcing range instead of moving with control.
- Holding your breath—use steady breathing to reduce tension.
Keep things comfortable and stop if something feels wrong.
- Stop if you feel sharp pain, numbness, tingling, dizziness, or symptoms that radiate.
- Move within a comfortable range—stretching should feel like mild-to-moderate tension, not pain.
- Avoid bouncing in stretches; use steady holds and controlled movement.
Why people include this movement in their practice.
- Enhances trunk stiffness and pelvic control to support the spine during movement.
Similar movements to explore next
-
Bicycle Crunch Hold
Hold Bicycle Crunch Hold with control through full body — build stability and steady breathing in Flexor.
-
Bird Dog Plank
Hold Bird Dog Plank with control through full body — build stability and steady breathing in Flexor.
-
Hollow Body Hold
Hold Hollow Body Hold as a static hollow hold for bracing endurance without rocking or swinging.
-
Mountain Climbers
Learn Mountain Climbers for full body with step-by-step Flexor cues.
-
Plank Hold
Hold Plank Hold with control through full body — build stability and steady breathing in Flexor.
-
Superman Hold
Hold Superman Hold with control through full body — build stability and steady breathing in Flexor.
-
V-Sit
Use V-Sit as a mobility drill for full body to improve range and movement quality in Flexor.
-
Crunch Hold
Hold Crunch Hold with control through full body — build stability and steady breathing in Flexor.
Common questions
Which body areas does Crunches target?
Crunches is a mobility movement that mainly targets your core and glutes. Move within a comfortable range and skip it if it does not feel suitable for you.
Which muscles does Crunches work?
Primary muscles associated with Crunches include gluteus maximus. Flexor presents this as general wellness guidance, not a clinical assessment.
Is Crunches suitable for beginners?
Crunches is listed as intermediate in Flexor. Choose a smaller range of motion, fewer repetitions, or an easier variation whenever you want more control.
How long should you hold Crunches?
In Flexor, Crunches runs for about 45 sec per round. Adjust the time to what feels sustainable, breathe steadily, and ease off sooner if anything feels sharp.
How do you do Crunches?
Crunches has 4 guided steps. Follow them in order on this page, breathe steadily, and keep the movement smooth and within a comfortable range. Stop if anything feels sharp, unstable, or unsafe for you.
Do you need any equipment for Crunches?
No. Crunches is a no-equipment movement you can do at home with just enough space to move comfortably.
Is this medical advice?
No. Flexor provides general fitness and wellness guidance. It does not diagnose, treat, or prevent medical conditions. Speak with a qualified professional about injuries, persistent pain, or health concerns.
