“I will never go to a regular chiropractor again. Dr Gregory is awesome! I had bad neck and back pain for a long time and I've not had pain since visiting him! He's kind and genuinely cares about helping and focuses on finding and fixing the...”
Lifeline Chiropractic: Gentle Chiropractic and Applied Kinesiology in Tucson
Patient Reviews
4.9 Stars on Google with 70+ Reviews
Trusted Tucson chiropractic care backed by decades of local experience and patient feedback.
A long-standing Tucson practice with a reputation patients can see before they schedule.
“I have been a patient of Dr. Penniston’s for 5+ years and I would highly recommend him. He has a whole body approach incorporating Kinesiology and gentle Chiropractic manipulation. In addition to general care, he has helped me heal after two...”
“I wanted a Dr. who could help me heal; not someone who wanted to mask the symptoms with prescription drugs so that overtime I would get sicker plus suffer the inevitable side effects of the drugs. I found that Dr. in Dr. Penniston. From healing...”
“Wish I could give more stars. I have been dealing w/ pain for many years and thought it could not be fixed after other dr/chiropractor visits. After 1 visit to Dr Penniston I was able to see a glimmer of light at the end of the tunnel. After...”
You are not just a number here.
Lifeline Chiropractic is a local Tucson office where patients can feel known, heard, and cared for. Dr. Penniston and the office team take time to understand the person behind the pain, not just the symptom on the chart.
Personalized care
Care is based on your history, your body, and what may be causing the problem to return.
Family-like support
The office team works to make each patient feel welcome, informed, and supported.
Root-cause focus
The goal is not just temporary relief, but understanding the factors behind the pain whenever possible.
What Makes Lifeline Different
More than a quick adjustment.
Dr. Penniston draws from several chiropractic and supportive techniques so treatment can be based on the individual examination instead of using the same approach for every patient.
- Chiropractic adjustments for the spine and extremity joints
- Applied kinesiology and muscle testing
- Posture and body-use correction
- Nutrition, hydration, supplement, and lifestyle support
- Soft-tissue therapy, therapeutic exercise, laser therapy, and soft shockwave therapy
Gift Cards
Give someone a visit to Lifeline.
Lifeline gift cards are available through Jane. Choose an amount online and send the gift card to someone you care about.
Buy a Gift CardMeet the Doctor
Meet Dr. Gregory K. Penniston.
Dr. Penniston has spent more than four decades helping Tucson patients understand why pain keeps returning and what can be done to support long-term relief. He graduated magna cum laude from Sherman College of Chiropractic in 1980, began practice in 1982, and opened Lifeline Chiropractic in Tucson in 1983. His approach is gentle, thoughtful, and practical. Rather than treating every patient with the same quick adjustment, he looks at posture, muscle balance, joint alignment, nutrition, lifestyle, and body mechanics to better understand what may be driving the problem.
Serving Tucson since 1983
Sherman College graduate
Gentle whole-body care
Applied kinesiology focus
A different kind of chiropractic visit.
Patients often come to Lifeline after trying medication, physical therapy, massage, or other chiropractic care without lasting relief. The goal is to look for the cause behind the pattern, not simply cover up the pain for a few days.
That is why Lifeline's care may include chiropractic adjustments, applied kinesiology, posture and body-use work, nutrition, soft tissue therapy, and practical lifestyle guidance.