Aquatic Therapy for Chronic Low Back Pain

Chronic low back pain (CLBP) is one of the leading causes of disability worldwide and is often accompanied by psychological factors such as anxiety, depression, fear of movement and poor sleep. A 2026 randomized controlled trial investigated whether aquatic therapy for chronic low back pain offers additional benefits compared with standard conservative care.

Thirty-four adults with chronic non-specific low back pain participated in a supervised 10-week rehabilitation programme. Participants received either aquatic therapy or standard land-based care twice weekly under the guidance of certified therapists.

Why aquatic therapy is beneficial for chronic low back pain

People with chronic low back pain often avoid movement because they fear pain or reinjury. This cycle of pain, inactivity and fear can contribute to long-term disability.

Aquatic therapy creates a safe rehabilitation environment where buoyancy reduces spinal loading, allowing patients to move with less discomfort while progressively strengthening the trunk, hips and lower limbs.

The supportive properties of water may also help patients regain confidence during movement, making rehabilitation both physically and psychologically more effective.

Study design

Researchers compared two rehabilitation programmes:

Aquatic therapy

Participants completed:

• Two supervised sessions per week
• 60-minute sessions
• 10-week programme
• Warm-up, aerobic exercise and dynamic strengthening
• Core stability training
• Hip strengthening exercises
• Functional resistance exercises
• Stretching and relaxation

Exercises were individually progressed according to each participant’s abilities and monitored using pain ratings and perceived exertion.

Standard care

The comparison group received personalised land-based rehabilitation consisting of:

• Manual therapy
• Joint mobilisations
• Soft tissue techniques
• Progressive strengthening exercises
• Core stability training
• Home exercise programme

Both interventions reflected realistic clinical rehabilitation programmes.

Key findings

The study found that both treatment approaches produced meaningful improvements in several important clinical outcomes.

Significant pain reduction

Both aquatic therapy and standard care significantly reduced pain intensity.

Participants in both groups achieved improvements that exceeded the minimum clinically important difference for chronic low back pain.

Reduced disability

Self-reported disability decreased significantly in both rehabilitation programmes.

Although the aquatic therapy group demonstrated a larger improvement in disability scores, the difference between groups was not statistically significant.

Improved physical quality of life

Participants in both groups experienced significant improvements in physical quality of life after completing the 10-week programme.

Mental quality of life improved only slightly and did not reach statistical significance.

Unique benefits of aquatic therapy

While both rehabilitation programmes improved physical outcomes, aquatic therapy demonstrated additional benefits in two important psychological domains.

Reduced fear of movement

Only the aquatic therapy group showed a statistically significant reduction in kinesiophobia, or fear of movement.

Reducing fear of movement is particularly important because it encourages patients to remain physically active and may help prevent persistent disability.

Improved sleep quality

Only participants receiving aquatic therapy experienced significant improvements in sleep quality.

Better sleep may contribute to improved recovery, reduced pain sensitivity and enhanced overall well-being.

Psychological outcomes

Both treatment groups demonstrated significant improvements in several psychological measures.

Reduced anxiety and depression

Participants in both groups reported lower levels of anxiety and depression following rehabilitation.

These improvements reinforce the value of structured exercise programmes for managing the psychological burden associated with chronic pain.

Less pain catastrophizing

Both groups also demonstrated significant reductions in pain catastrophizing.

This indicates that patients became less likely to interpret pain as threatening or overwhelming, an important factor in successful chronic pain rehabilitation.

Why exercising in water works

The therapeutic properties of water provide several advantages for people with chronic low back pain.

Buoyancy reduces spinal loading

Water supports body weight, decreasing compressive forces on the spine and allowing painful movements to be performed more comfortably.

Water resistance strengthens safely

Natural water resistance provides progressive strengthening without requiring heavy external loads.

This makes aquatic therapy particularly suitable for individuals who struggle with conventional resistance training.

Water encourages confident movement

Because movement feels easier and less painful in water, patients often become more willing to perform functional exercises.

This may explain the observed reduction in fear of movement.

Clinical implications

This randomized controlled trial demonstrates that aquatic therapy is at least as effective as standard conservative care for chronic non-specific low back pain.

Importantly, aquatic therapy may provide additional psychological benefits by reducing fear of movement and improving sleep quality, both of which are recognised contributors to long-term recovery.

For patients who experience pain during land-based exercise or who have developed movement-related anxiety, aquatic therapy represents an excellent rehabilitation option.

Conclusion

This 2026 randomized controlled trial confirms that aquatic therapy for chronic low back pain is an effective treatment for reducing pain, disability and improving physical quality of life.

Although overall improvements were comparable to standard care, aquatic therapy provided additional benefits for fear of movement and sleep quality, highlighting its value within a comprehensive biopsychosocial rehabilitation approach.

The authors conclude that aquatic therapy is a comfortable, safe and evidence-based alternative for individuals living with chronic non-specific low back pain.