If you live with low back pain, you know how much it can interrupt your daily life. Sleeping is difficult, chores feel like a burden and even a short walk can be daunting. Moving your body is one of the most reliable ways to reduce back pain over time, and one of the most beginner-friendly places to start moving is in the pool.

Performing guided exercise in warm water with a licensed physical therapist is referred to as aquatic therapy. Many programs take place in chest-deep water, so you don’t have to be a swimmer. Aquatic therapy is different from traditional water aerobics as it focuses more on core strength, stability and balance specific to your needs. How does it help?

Buoyancy reduces load on joints and discs. When you’re immersed in water, your body “weighs” less because buoyancy offsets gravity. In waist-deep water, you unload about half your body weight; in chest-deep water, about 75%. The lighter load makes it easier to move stiff or painful areas and practice better movement patterns without exacerbating symptoms.

Hydrostatic pressure supports circulation and provides stability. Water exerts a uniform pressure around your body that helps push fluid back toward the heart. This can reduce swelling, improve blood flow and offer a subtle stabilizing “hug” around the trunk. Many people find this makes balance exercises and core activation feel more secure than on land.

Water provides adjustable resistance. If you move slowly, the water resists a little. If you move faster, the water resists more. This makes it easy to adjust effort without weights or machines. Exercises often feel smoother and safer for irritated backs.

Warmth relaxes muscles. Physical therapy pools are usually warmer than lap pools, often in the low 90s F. Warm water helps muscles relax and can make stretching and mobility work more comfortable.

Studies report that when comparing supervised aquatic exercise with standard physical therapy treatments like heat and TENS, water-exercise groups demonstrate greater reductions in pain and disability, with many maintaining those improvements for up to 12 months.

Aquatic exercises should feel comfortable to moderately challenging, but not painful. You should be able to talk in full sentences while working. A typical session lasts 45–60 minutes and focuses on multiple elements specific to individual needs. For example:

Warm-up/cardiac endurance: water walking in different directions.

Core and lower extremity strength: standing marches, mini-squats holding the pool rail, hip abduction/adduction and gentle “pull-downs” with a foam noodle to engage core muscles.

Mobility, range of motion, and stretching: hamstring and hip flexor stretches at the pool wall, gentle spinal rotations and ankle mobility work.

Balance: tandem or single-leg stances.

Who tends to benefit most? Those whose pain worsens with standing or walking and those recovering from a painful flare-up; people with stiffness, low fitness or balance worries; and those who have failed other conservative treatments. Many use the pool to calm pain and restore movement, then transition to land-based therapy.

Aquatic therapy isn’t a magic cure, but it is a gentle and often enjoyable way to get meaningful exercise with low back pain. Regular sessions build strength, flexibility and confidence. If low back pain has been keeping you on the sidelines, the pool might be the most comfortable place to start to improve your health.

Jessica Super is a doctor of physical therapy and owner of Dynamic Physical Therapy in Palm Desert. She is a member of Desert Doctors and can be reached at (760) 501.6655. For more information, visit www.desertdoctors.org.

References: 1) Wang X-Q., et al. “Efficacy of Therapeutic Aquatic Exercise vs, Physical Therapy Modalities for Patients With Chronic Low Back Pain: A Randomized Clinical Trial.” JAMA Network Open. 2022;5(1):e2142063; 2) Shi Z., et al. “Aquatic Exercises in the Treatment of Low Back Pain: A Systematic Review and Meta-Analysis of Eight Studies.” American Journal of Physical Medicine & Rehabilitation. 2018;97(2):116-122.