Participant receives High Velocity Low Amplitude Spinal Manipulation (HVLA) to the low back only from a doctor of chiropractic. Also receives focused palpation procedures to the low back paired with visual input of these procedures using a tablet computer. During a HVLA treatment, the study doctor will ask the participant to lie on their side on a treatment table. The doctor will make a quick and controlled push with their hand to slightly move joints in the low back. During palpation procedure, the doctor will touch several areas in the low back while asking questions about pain, tenderness and other sensations felt during this procedure. The participant will watch the doctor perform the palpation procedure in real time with a tablet computer.

The doctor of chiropractic will perform a massage of each foot while the participant lies face up in a relaxed position on a treatment table. The procedure will last approximately 10-20 minutes including massage to the toes, heel, sole, and top of each foot.

This treatment will be applied to the low back region only. During a HVLA treatment, the study doctor will ask the participant to lie on their side on a treatment table. After carefully helping the participant into the proper position, the doctor will make a quick and controlled push with their hand to slightly move joints in the low back. During this procedure, the participant may feel and/or hear a popping sound. After treatment, the doctor may ask the participant to rest on the table for a few moments. During palpation procedure, the doctor will touch several areas in the low back while asking questions about pain, tenderness and other sensations felt during this procedure. The participant will watch the doctor perform the palpation procedure in real time with a tablet computer.

The Back Pain Visual Analogue Scale (VAS) has excellent metric properties, is easy to administer and score, and is commonly used in LBP research. Our anchors will be no pain to worst pain imaginable and use the average of 3 VAS questions: worst LBP in the last 24 hours; least LBP in the last 24 hours; and average LBP in the last 24 hours.

The investigators will also use the participant self-report modified 23-item version of the Roland Morris Disability Questionnaire (RMDQ) to assess LBP related disability. The RMDQ may be the most common and respected LBP assessment instrument in LBP outcomes research. It is a one-page questionnaire related to low back pain disability with documented reliability and validity. It can discriminate between different forms of treatment for back pain, and it is sensitive to clinical change. The RMDQ has been chosen for a number of clinical trials of LBP treatments for its excellent metric properties, ease of use, participant acceptance, and high face validity.

The investigators will monitor: 1) adverse events (AE) that are possibly, probably, or definitely related to a study intervention and 2) serious adverse events (SAE) regardless of their attribution at all study visits over 4 weeks. For this study, we define an AE as any untoward medical occurrence that may present itself during the conduct of the study and which may or may not have a causal relationship with the study procedures. Clinicians assess whether an AE is: 1) mild, moderate, severe, or serious; 2) expected (disclosed in the Consent Form or part of an underlying disease) or unexpected (more serious than expected, or not disclosed in the Consent Form); and 3) definitely related to intervention, probably related, possibly related, unlikely related or unrelated.