Mighty Nimble
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Long COVID Reconditioning — 25 Minutes

A paced, low-impact reconditioning session using nasal breathing and controlled effort (RPE ~3–5).

Warm-Up

Gradually raise heart rate and prepare joints while keeping effort easy. Paced approach to ease into movement.

Diaphragmatic Breathing
Diaphragmatic Breathing1 min
How to

A slow breathing drill that trains relaxed belly breathing and helps you control your breath.

  1. Lie on your back or sit tall with one hand on your belly.
  2. Inhale through your nose and let your belly rise.
  3. Exhale slowly and let your belly fall.
  4. Keep your chest and shoulders quiet.
  5. Continue for the set time with smooth breaths.
Form cues
  • Breathe low into your belly
  • Keep your shoulders relaxed
Common mistakes
  • Shrugging your shoulders as you inhale
  • Forcing the breath or holding tension
Shoulder Roll
Shoulder Roll45 sec
How to

A simple shoulder mobility move that warms up your upper back, neck, and shoulders.

  1. Stand tall with your arms relaxed at your sides.
  2. Lift both shoulders up toward your ears.
  3. Roll them back and down in a smooth circle.
  4. Repeat for reps, then reverse the direction if needed.
Form cues
  • Move slowly and smoothly.
  • Keep your neck relaxed.
Common mistakes
  • Shrugging with tension in your neck.
  • Rushing through small, jerky circles.
March in Place
March in Place1 min
How to

A low-impact cardio move that warms up your legs and hips while raising your heart rate.

  1. Stand tall with your feet hip-width apart and arms at your sides.
  2. Lift one knee to hip height as you swing the opposite arm forward.
  3. Lower that foot, then lift the other knee and switch arms.
  4. Keep alternating sides at a steady pace.
  5. Slow down and plant both feet to finish.
Form cues
  • Stand tall with your chest up
  • Land softly under your hips
Common mistakes
  • Leaning back as you lift your knees
  • Stomping your feet on each step
Cat-Cow Stretch
Cat-Cow Stretch1 min
How to

A gentle spine mobility move that alternates rounding and arching your back on hands and knees.

  1. Start on hands and knees with wrists under shoulders and knees under hips.
  2. Inhale and drop your belly as you lift your chest and tailbone.
  3. Exhale and round your back, tucking your chin and tailbone.
  4. Move slowly between both positions with your breath.
Form cues
  • Move one vertebra at a time.
  • Keep your shoulders away from your ears.
Common mistakes
  • Forcing your neck up or down.
  • Rushing through the movement.

Main Reconditioning Circuit

Low-impact strength and aerobic work. Keep RPE ~3–5 and avoid breath-holding.

Sit to Stand
Sit to Stand10x
How to

A chair-based squat pattern that trains your thighs and glutes for standing strength.

  1. Sit near the front of a chair with feet flat and hip-width apart.
  2. Lean slightly forward and brace your core.
  3. Press through both feet and stand tall.
  4. Push your hips back and sit down with control.
Form cues
  • Keep your knees tracking over your toes
  • Stand tall at the top
Common mistakes
  • Letting your knees cave inward
  • Dropping hard onto the chair
Wall Push Up
Wall Push Up12x
How to

A standing push-up against a wall that trains your chest, shoulders, and triceps.

  1. Stand facing a wall and place your hands at chest height.
  2. Step your feet back so your body forms a straight line.
  3. Bend your elbows and lower your chest toward the wall.
  4. Press the wall away to return to the start.
  5. Repeat for your planned reps.
Form cues
  • Keep your body straight
  • Keep elbows about 45 degrees
Common mistakes
  • Letting your hips sag
  • Shrugging your shoulders toward your ears
Step Up (Low Step)
Step Up (Low Step)45 sec each side
How to

A single-leg climb onto a step that trains your quads, glutes, and balance.

  1. Stand facing a sturdy step with one foot fully on top.
  2. Lean slightly forward and drive through the front foot to stand up.
  3. Bring your back foot onto the step with control.
  4. Step back down with the same back foot, then lower the front foot.
  5. Finish your reps, then switch legs.
Form cues
  • Keep your chest tall
  • Drive through your whole front foot
Common mistakes
  • Pushing off too much with the back foot
  • Letting your front knee cave inward
Bird Dog
Bird Dog30 sec
How to

A core stability move from all fours that trains your abs, back, glutes, and balance.

  1. Start on hands and knees with your hands under shoulders and knees under hips.
  2. Brace your core and keep your back flat.
  3. Reach one arm forward and the opposite leg back until they are straight.
  4. Pause briefly, then bring your hand and knee back under you.
  5. Repeat on the other side, alternating each rep.
Form cues
  • Keep your hips square
  • Move slow and controlled
Common mistakes
  • Arching or sagging your lower back
  • Rotating your hips as you reach
Glute Bridge
Glute Bridge12x
How to

A floor hip lift that trains your glutes and hamstrings with both feet planted.

  1. Lie on your back with knees bent and feet flat, hip-width apart.
  2. Brace your core and press your arms lightly into the floor.
  3. Drive through your heels and lift your hips until your body forms a straight line.
  4. Squeeze your glutes at the top, then lower with control.
  5. Repeat for your reps.
Form cues
  • Keep your ribs down
  • Drive through your heels
Common mistakes
  • Arching your lower back at the top
  • Pushing through your toes
3 rounds · 30 sec rest

Cool-Down

Downshift breathing and gently stretch to finish.

Diaphragmatic Breathing
Diaphragmatic Breathing1 min
How to

A slow breathing drill that trains relaxed belly breathing and helps you control your breath.

  1. Lie on your back or sit tall with one hand on your belly.
  2. Inhale through your nose and let your belly rise.
  3. Exhale slowly and let your belly fall.
  4. Keep your chest and shoulders quiet.
  5. Continue for the set time with smooth breaths.
Form cues
  • Breathe low into your belly
  • Keep your shoulders relaxed
Common mistakes
  • Shrugging your shoulders as you inhale
  • Forcing the breath or holding tension
Hamstring Stretch (Seated)
Hamstring Stretch (Seated)45 sec each side
How to

A held stretch for the back of your thigh that targets your hamstrings.

  1. Sit tall with your target leg straight and toes up.
  2. Hinge at your hips and reach toward your foot.
  3. Stop when you feel a gentle stretch behind your thigh.
  4. Hold the stretch and breathe slowly.
  5. Release slowly, then switch sides if stretching one leg.
Form cues
  • Keep your back long.
  • Hinge from your hips.
Common mistakes
  • Rounding your back to reach farther.
  • Bouncing in the stretch.
Child’s Pose
Child’s Pose1 min
How to

A kneeling rest pose that gently stretches your back, hips, and shoulders.

  1. Kneel on the floor with your big toes together and knees apart.
  2. Sit your hips back toward your heels.
  3. Fold forward and reach your arms in front of you.
  4. Rest your forehead down and let your chest sink between your thighs.
  5. Hold the position and breathe slowly.
Form cues
  • Relax your shoulders
  • Breathe into your back
Common mistakes
  • Forcing your hips down
  • Holding your breath
Rebuilding the Aerobic Foundation First

Rebuilding the Aerobic Foundation First

March in Place and Step Ups target Type I slow-twitch fibers and mitochondrial density without triggering post-exertional malaise. Sit to Stand and Glute Bridge reload the posterior chain through controlled, closed-chain movement — restoring neuromuscular recruitment patterns that autonomic dysfunction often disrupts.

Why Post-COVID Bodies Demand Pacing

Why Post-COVID Bodies Demand Pacing

Long COVID impairs cellular energy production at the mitochondrial level, meaning perceived effort spikes disproportionately to actual output. Nasal breathing acts as a built-in throttle, keeping heart rate within parasympathetic-friendly zones and preventing the symptom flare that follows anaerobic threshold crossings.

RPE as Your Periodization Tool

RPE as Your Periodization Tool

Bird Dog and Cat-Cow aren't just mobility work — they retrain proprioception and spinal stabilization that fatigue and deconditioning erode. Track your RPE session to session; when RPE 3 feels like RPE 1 across two consecutive sessions, that's your signal to cautiously add one rep or one set — never both simultaneously.

Long COVID Reconditioning — 25 Minutes | Mighty Nimble | Mighty Nimble