Midsection
Build a steady, supportive core.
The core wraps the whole midsection — front, sides and deep layers — and its main job is to keep the trunk steady while the arms and legs do the moving. A core that braces well transfers force smoothly and takes load off the lower back.
Flexor gathers controlled stability work here — bracing, anti-rotation and gentle trunk mobility — so you can support the spine rather than chase burn.
Start here
A short, guided starting point for Core — begin gently and stay within a comfortable range.
anti-rotation
Bird Dog Plank
stability
Bridge
back and hips
Cat Cow
gentle mobility
Bicycle Crunch Hold
control
Guided routines to start with
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12 min AdvancedCore & Stability Light-up
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 15.
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5 min IntermediateCore on Fire
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 7.
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9 min BeginnerAnti-Sitting Routine
A travel-friendly Flexor loosen-up for full body after long sitting so your body feels freer again. Session 4.
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About the Core
The core includes the deep transversus abdominis, the obliques on the sides, the rectus abdominis at the front and the muscles alongside the spine and pelvic floor.
Together they brace and resist unwanted motion so the spine stays stable while you lift, reach, twist or carry.
The core links the ribcage to the pelvis and hips, so steady core control usually supports the lower back and smoother movement overall.
When people reach for this
Supporting the lower back
Steady bracing and anti-rotation work help the trunk stay supported through daily tasks.
Lower Back ComfortWarming up to train
A few control drills wake up the midsection before a workout or a run.
Pre Workout MobilityExercises for Core
Routines for Core
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9 min Beginner
Anti-Sitting Routine
A travel-friendly Flexor loosen-up for full body after long sitting so your body feels freer again. Session 4.
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17 min BeginnerBack-to-Hip Comfort Routine
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 32.
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9 min BeginnerCool-Down: Back and Shoulders
A post-session downshift for full body that reduces tightness and supports a relaxed range with timed holds. Session 3.
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14 min AdvancedCool-Down: Full-Body Release
A post-session downshift for full body that reduces tightness and supports a relaxed range with timed holds.
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9 min AdvancedCool-Down: Hip Flexor Unwind
A post-session downshift for full body that reduces tightness and supports a relaxed range with timed holds. Session 7.
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12 min BeginnerCool-Down: Legs and Hips
A post-session downshift for full body that reduces tightness and supports a relaxed range with timed holds. Session 2.
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16 min IntermediateCool-Down: Post-Strength Stretch
A post-session downshift for full body that reduces tightness and supports a relaxed range with timed holds. Session 5.
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12 min IntermediateCool-Down: Upper Back Unknot
A post-session downshift for full body that reduces tightness and supports a relaxed range with timed holds. Session 8.
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12 min Advanced
Core & Stability Light-up
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 15.
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5 min Intermediate
Core on Fire
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 7.
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10 min IntermediateDrift to Sleep
A calming downshift routine to ease tension and settle your body for sleep.
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12 min BeginnerElbow & Hand Comfort Flow
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 35.
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8 min IntermediateEvening Mobility Unwind
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 17.
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10 min BeginnerExpress Neck Release
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement.
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6 min AdvancedFasting-Friendly Ease Level 1
Follow Fasting-Friendly Ease Level 1 in Flexor — a guided session for full body with clear timing and comfortable ranges.
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11 min IntermediateFasting-Friendly Ease Level 3
Follow Fasting-Friendly Ease Level 3 in Flexor — a guided session for full body with clear timing and comfortable ranges.
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12 min BeginnerForearm Release
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 33.
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16 min IntermediateFull Body Flow
A smooth full-body flow that builds mobility and control from head to toe.
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14 min Advanced
Full-Body Flexibility Builder
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 13.
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12 min Intermediate
Gentle Neck Release
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 2.
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17 min IntermediateGentle Nerve-Friendly Mobility
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 30.
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17 min BeginnerGlute & Hamstring Comfort
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 31.
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16 min Intermediate
Glute & Hip Reset
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 13.
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10 min BeginnerHead & Neck Ease
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 5.
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12 min Intermediate
Hip Comfort
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 11.
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18 min IntermediateHip Opener Flow
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 12.
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16 min Intermediate
Hip-to-Back Comfort
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 26.
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6 min IntermediateHotel Room Decompress
A travel-friendly Flexor loosen-up for full body after long sitting so your body feels freer again. Session 5.
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13 min IntermediateLower Back Comfort
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 27.
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10 min BeginnerLower-Back Comfort Reset
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 24.
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6 min BeginnerLowerbody Unlock
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 2.
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8 min BeginnerMini Mobility Boost
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 3.
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22 min IntermediateMobility and Control
A progressive mobility session to improve control, range of motion, and movement quality.
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10 min BeginnerNeck Mobility Recharge
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 4.
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10 min BeginnerOverhead Mobility
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 10.
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11 min Intermediate
Post-Commute Flow
A travel-friendly Flexor loosen-up for full body after long sitting so your body feels freer again. Session 6.
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10 min Beginner
Post-flight Mobility
A travel-friendly Flexor loosen-up for full body after long sitting so your body feels freer again. Session 3.
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8 min AdvancedPost-Workout Stretch: Chest & Shoulders
A controlled Flexor stretch routine for full body to support length after training without rushing. Session 5.
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13 min IntermediatePost-Workout Stretch: Full Body
A controlled Flexor stretch routine for full body to support length after training without rushing.
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10 min IntermediatePost-Workout Stretch: Hips & Hamstrings
A controlled Flexor stretch routine for full body to support length after training without rushing. Session 4.
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9 min BeginnerPost-Workout Stretch: Upper Body
A controlled Flexor stretch routine for full body to support length after training without rushing. Session 3.
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7 min AdvancedPre-Workout Mobility: Core
A focused mobility primer for full body to improve movement quality before training with Flexor. Session 5.
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14 min IntermediatePre-Workout Mobility: Full Body
A focused mobility primer for full body to improve movement quality before training with Flexor.
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11 min IntermediatePre-Workout Mobility: Hips
A focused mobility primer for full body to improve movement quality before training with Flexor. Session 2.
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8 min AdvancedPre-Workout Mobility: Shoulders
A focused mobility primer for full body to improve movement quality before training with Flexor. Session 3.
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6 min BeginnerQuick Chest Opener
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 12.
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10 min AdvancedQuick Desk Reset
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor.
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7 min IntermediateQuick Hip Opener
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 4.
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7 min BeginnerQuick Shoulder Unlock
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 5.
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8 min Beginner
Quick Upper Back Unknot
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 9.
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10 min Intermediate
Recovery: 9-5 Reset
A low-intensity Flexor recovery session for full body to ease tension and keep you moving comfortably. Session 7.
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10 min IntermediateRecovery: Breath and Reset
A low-intensity Flexor recovery session for full body to ease tension and keep you moving comfortably. Session 6.
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14 min IntermediateRecovery: Full-Body Reset
A low-intensity Flexor recovery session for full body to ease tension and keep you moving comfortably.
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10 min IntermediateRecovery: Gentle Mobility Day
A low-intensity Flexor recovery session for full body to ease tension and keep you moving comfortably. Session 4.
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13 min IntermediateRecovery: Lower-Body Flush
A low-intensity Flexor recovery session for full body to ease tension and keep you moving comfortably. Session 2.
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8 min BeginnerRecovery: Post-Travel Unwind
A travel-friendly Flexor loosen-up for full body after long sitting so your body feels freer again.
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10 min IntermediateRecovery: Soft Tissue Flow
A low-intensity Flexor recovery session for full body to ease tension and keep you moving comfortably. Session 5.
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9 min IntermediateRecovery: Upper-Body Reset
A low-intensity Flexor recovery session for full body to ease tension and keep you moving comfortably. Session 3.
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9 min BeginnerRise and Shine
A bright, full-body wake-up flow to loosen joints and switch on your posture for the day.
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15 min BeginnerSciatic Nerve Floss
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 29.
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12 min BeginnerSeated Hip Routine
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 14.
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14 min BeginnerShield Your Spine
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 28.
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14 min IntermediateShoulder Glide Routine
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 7.
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12 min Advanced
Shoulder Space Builder
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 6.
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14 min Advanced
Shoulder Stability & Ease
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 9.
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13 min BeginnerSpine-Friendly Mobility
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 25.
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8 min AdvancedStrength Prep Mobility Flow
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 14.
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9 min IntermediateThe Chest Opener
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 8.
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8 min IntermediateThe Glute Primer
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 11.
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9 min AdvancedTravel Stiffness Release
A travel-friendly Flexor loosen-up for full body after long sitting so your body feels freer again. Session 2.
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13 min IntermediateUn-slouch
A posture-focused reset to reconnect core support and open the upper back and chest.
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13 min IntermediateUnlock Hip Flexors
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 15.
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16 min Intermediate
Upper Trap Unwind
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 3.
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9 min AdvancedWarm-Up: Full-Body Shakeout
A readiness warm-up to raise temperature, open full body, and prepare your body to move with Flexor cues. Session 6.
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10 min Beginner
Warm-Up: Shoulder Readiness
A readiness warm-up to raise temperature, open full body, and prepare your body to move with Flexor cues. Session 2.
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14 min AdvancedWarm-Up: Strength Session Primer
A readiness warm-up to raise temperature, open full body, and prepare your body to move with Flexor cues. Session 5.
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8 min Beginner
Warm-Up: Upper-Body Activation
A readiness warm-up to raise temperature, open full body, and prepare your body to move with Flexor cues. Session 9.
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22 min Intermediate
Weekend Reset Flow
A short guided mobility reset for full body — reduce stiffness and support comfortable movement with Flexor. Session 16.
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11 min IntermediateWrist-Friendly Mobility
A comfort-first Flexor routine for full body that eases stiffness and supports easier everyday movement. Session 34.
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How Flexor personalises this
Flexor mixes stability, control and gentle mobility to fit your goals — more bracing for lifting, more control for everyday comfort — from the sessions you log.
See personalised plansExplore related pages
Move comfortably
- Keep the spine long and breathe steadily rather than holding your breath.
- Build holds and reps gradually, easing off if the lower back complains.
This is general fitness guidance, not medical advice or treatment. Move within a comfortable range, and speak to a qualified professional about pain that persists or worsens.
Read the full wellness disclaimerWritten by Flexor editorial Last reviewed July 2026
Common questions
What is the difference between core and abs?
The abs are the front sheet of muscle you can see, while the core is the whole cylinder — front, sides, deep layers and the muscles alongside the spine. Training the core means working all of that, not only the front.
How do I strengthen my core safely?
Start with stability moves like bird dog and bridges that ask the trunk to stay still while a limb moves, keeping the spine long and breathing steadily. Add range and reps gradually as control improves.
Do I need crunches for a strong core?
Not necessarily. Anti-rotation and bracing drills build the stability most people are after, and many find them kinder on the neck and lower back than repeated crunches.
How often should I train my core?
A few short, controlled sessions across the week tend to work well. Because the core also assists other exercises, you may already be using it more than you realise.
