Pool & Aquatic Exercises
Overview
Water provides a unique rehabilitation environment. Buoyancy reduces body weight by up to 90% (depending on depth), allowing movements that would be too difficult or painful on land. Hydrostatic pressure helps control swelling. Water resistance provides gentle strengthening in all directions.
When Can I Start?
Requirement: Incisions must be fully healed (typically 2-3 weeks post-op). Wait until your surgeon clears you for pool activities. Open wounds + pool water = infection risk.
Key Benefits
- Reduced weight bearing: Chest-deep water = 10% body weight
- Swelling control: Hydrostatic pressure helps fluid return
- Early gait training: Walk before you can walk on land
- 360° resistance: Water resists all movement directions
- Psychological boost: Feel more normal/active earlier
- Cardiovascular fitness: Maintain conditioning while protecting knee
Water Depth Guide
| Water Level | % Body Weight | Best For |
|---|---|---|
| Neck/Shoulder | ~10% | Early walking, minimal stress |
| Chest | ~25-35% | Walking, light jogging |
| Waist | ~50% | Strengthening, more challenge |
| Hip | ~60-70% | Transitioning to land |
Pool Exercise Progressions
Level 1: Pool Walking (Week 2-4)
Forward Walking
- Start in chest-deep water
- Walk forward with normal gait pattern
- Focus on heel-to-toe contact
- Swing arms naturally
- Walk lengths of pool (5-10 minutes)
Backward Walking
- Same depth as forward walking
- Walk backward, leading with ball of foot
- Excellent for quad activation
- 5-10 minutes
Lateral Walking
- Side-step across pool
- Keep toes pointed forward
- Don't let feet touch together
- Work both directions equally
Level 2: Deep Water Running (Week 4+)
- Use flotation belt in deep end
- Mimic running motion without touching bottom
- Drive knees up, pump arms
- Maintain upright posture (slight forward lean)
- Start with 10-15 minutes, build to 30+
Cardio tip: Deep water running can be surprisingly intense. It's excellent for maintaining fitness without impact.
Level 3: Strengthening Exercises (Week 4+)
Water Squats
- Stand in waist-deep water
- Perform squat as you would on land
- Water provides resistance on way up
- 3 sets of 15 reps
Water Lunges
- Step forward into lunge position
- Lower back knee toward pool floor
- Push back to starting position
- Alternate legs, 10 each side
Leg Swings
- Hold pool edge for support
- Swing surgical leg forward and back
- Then swing side to side
- Water resistance strengthens in all directions
- 20 swings each direction
Standing Knee Lifts
- March in place in chest-deep water
- Drive knee up to hip level
- Control the lowering (water resists both ways)
- 30 seconds to 1 minute
Level 4: Pool Jogging (Week 6-8)
- Move to chest-deep water
- Progress from fast walking to light jogging
- Maintain normal running form
- Water contact provides gentle impact
- Build from 5 to 20+ minutes
Transition: Pool jogging often comes before land jogging. It's a great way to build confidence.
Level 5: Plyometrics in Water (Month 3+)
- Jumping jacks: Classic movement with water resistance
- Tuck jumps: Jump and bring knees to chest
- Single leg hops: Small hops on surgical leg
- Lateral bounds: Jump side to side
Why water first: Water absorbs landing forces, letting you practice plyometric patterns before land progression.
Common Mistakes
Starting Too Soon
Entering pool before incisions fully heal. Wait for surgeon clearance (usually 2-3 weeks minimum).
Cold Water
Cold pools can increase stiffness. Ideal temperature is 83-88°F (28-31°C) for therapy.
Compensating Gait
Limping even in water. Focus on normal gait pattern—buoyancy should help, not hide, issues.
Overdoing It
Because it feels easier, doing too much too soon. Start conservatively—post-pool soreness is real.
Sample Pool Session
| Exercise | Duration | Notes |
|---|---|---|
| Forward walking (warm-up) | 5 min | Chest-deep |
| Backward walking | 3 min | Focus on quad activation |
| Lateral walking | 3 min each direction | Hip abductors |
| Water squats | 3 x 15 | Waist-deep |
| Leg swings | 20 each direction | Hold edge |
| Deep water running or pool jog | 10-15 min | Cardio conditioning |
| Cool-down walking | 5 min | Easy pace |
Total time: 30-40 minutes | Frequency: 2-4x per week
Helpful Equipment
Flotation Belt
Essential for deep water running. Keeps you upright without touching bottom.
Pool Noodles
Versatile for flotation assistance or resistance exercises.
Water Dumbbells
Foam dumbbells provide resistance when pushed through water.
Kickboard
Useful for flutter kicks and upper body support during leg exercises.