The exercise protocol for each group will be identical and modeled after the "Back to Fitness" program. This program will consist of a 5-10-minute cardiovascular warm-up of walking in place or riding an exercise bike. Next is a 15-minute circuit consisting of 10 different general exercises for 1-minute each. Finally, a 5-minute cool down will consist of light stretching and trunk range of motion exercises. Each exercise will be tailored as easy, medium, or hard depending on the individual patient's tolerance. This program has been shown to be equally as effective as motor control exercises for long-term outcomes in patients with non-specific LBP.

Weekly education sessions lasting approximately 30 minutes each, once a week for four weeks.

Session 1 will include a basic overview of the anatomy of the spine.

Session 2 will discuss an overview of stress symptoms to include hypervigilance, avoidance, and re-experiencing.

Session 3 will cover common recommendations delivered in stress education: the do's and don'ts of stress management.

Session 4: review and mindfulness.

The NPRS is an 11-point scale used to rate subjective pain intensity. The NPRS has been shown to have good validity and reliability. The scale ranges from 0 to 10 and has been shown to have acceptable responsiveness in patients with LBP. This study's scale was anchored at 0, "no pain at all", to 10, "the worst pain you could imagine."

The NPRS is an 11-point scale used to rate subjective pain intensity. The NPRS has been shown to have good validity and reliability. The scale ranges from 0 to 10 and has been shown to have acceptable responsiveness in patients with LBP. This study's scale was anchored at 0, "no pain at all", to 10, "the worst pain you could imagine."

The NPRS is an 11-point scale used to rate subjective pain intensity. The NPRS has been shown to have good validity and reliability. The scale ranges from 0 to 10 and has been shown to have acceptable responsiveness in patients with LBP. This study's scale was anchored at 0, "no pain at all", to 10, "the worst pain you could imagine."

The stressometer is a short, one-item scale that measures patient distress on a scale from 0-10. The stressometer is valid and responsive and correlates with more in-depth assessments of psychological stress. A score of 4 or higher is considered positive for moderate distress.

The Pain Catastrophizing Scale (PCS) measures pain catastrophizing which is defined as an exaggerated negative appraisal of noxious stimuli. The PCS has good validity and excellent reliability in a LBP population. Higher scores indicate more distressing beliefs about pain. Scores range from 0-52.

The Pain Catastrophizing Scale (PCS) measures pain catastrophizing which is defined as an exaggerated negative appraisal of noxious stimuli. The PCS has good validity and excellent reliability in a LBP population. Higher scores indicate more distressing beliefs about pain. Scores range from 0-52.

The Pain Catastrophizing Scale (PCS) measures pain catastrophizing which is defined as an exaggerated negative appraisal of noxious stimuli. The PCS has good validity and excellent reliability in a LBP population. Higher scores indicate more distressing beliefs about pain. Scores range from 0-52.

The Brief Survey of Pain Attitudes (SOPA-35) is a valid, reliable, and sensitive questionnaire that measures beliefs about pain across 7 domains. This study was particularly interested in the harm sub-scale to assess whether patient's beliefs that pain means harm changes after the intervention. Each domain is scored from 0-4 with 0 representing "very untrue" and 4 representing "very true." A higher score for the SOPA-Harm subscale indicates that participants believe that pain is a sign of harm and damage to a greater degree than participants with a lower score on the scale.

The Brief Survey of Pain Attitudes (SOPA-35) is a valid, reliable, and sensitive questionnaire that measures beliefs about pain across 7 domains. This study was particularly interested in the harm sub-scale to assess whether patient's beliefs that pain means harm changes after the intervention. Each domain is scored from 0-4 with 0 representing "very untrue" and 4 representing "very true." A higher score for the SOPA-Harm subscale indicates that participants believe that pain is a sign of harm and damage to a greater degree than participants with a lower score on the scale.

The Brief Survey of Pain Attitudes (SOPA-35) is a valid, reliable, and sensitive questionnaire that measures beliefs about pain across 7 domains. This study was particularly interested in the harm sub-scale to assess whether patient's beliefs that pain means harm changes after the intervention. Each domain is scored from 0-4 with 0 representing "very untrue" and 4 representing "very true." A higher score for the SOPA-Harm subscale indicates that participants believe that pain is a sign of harm and damage to a greater degree than participants with a lower score on the scale.

The Pain Self-Efficacy Questionnaire (PSEQ) is a questionnaire that measures an individual's self-perceived confidence to cope with physical activities "despite the pain". Studies demonstrate that individuals who have low self-efficacy have higher disability. Higher scores indicate a greater degree of confidence to function in life, "despite pain." Scores range from 0-60.

The Pain Self-Efficacy Questionnaire (PSEQ) is a questionnaire that measures an individual's self-perceived confidence to cope with physical activities "despite the pain". Studies demonstrate that individuals who have low self-efficacy have higher disability. Higher scores indicate a greater degree of confidence to function in life, "despite pain." Scores range from 0-60.

The Pain Self-Efficacy Questionnaire (PSEQ) is a questionnaire that measures an individual's self-perceived confidence to cope with physical activities "despite the pain". Studies demonstrate that individuals who have low self-efficacy have higher disability. Higher scores indicate a greater degree of confidence to function in life, "despite pain." Scores range from 0-60.

Patients were tested in the prone position with a pillow under their shins to achieve approximately 15 degrees of knee flexion. A research physical therapist applies a digital algometer probe (SBMEDIC Electronics, Sweden) with a gradual increase in force 5 cm lateral to the spinous process of L3 of the most symptomatic side until the participant reported the pressure as painful and pressed a button attached to the algometer. This procedure was performed three times at the low back and averaged to determine the patient's Pain Pressure Threshold with approximately 30 seconds rest between repetitions. Forces are measured in kPA with higher numbers indicating a greater tolerance for pressure and potentially less pain sensitivity.

Patients were tested in the prone position with a pillow under their shins to achieve approximately 15 degrees of knee flexion. A research physical therapist applies a digital algometer probe (SBMEDIC Electronics, Sweden) with a gradual increase in force 5 cm lateral to the spinous process of L3 of the most symptomatic side until the participant reported the pressure as painful and pressed a button attached to the algometer. This procedure was performed three times at the low back and averaged to determine the patient's Pain Pressure Threshold with approximately 30 seconds rest between repetitions. Forces are measured in kPA with higher numbers indicating a greater tolerance for pressure and potentially less pain sensitivity.

Patients were tested in the prone position with a pillow under their shins to achieve approximately 15 degrees of knee flexion. A research physical therapist applies a digital algometer probe (SBMEDIC Electronics, Sweden) with a gradual increase in force at the suprascapular region contralateral to the side tested in the low back, mid-way between the posterior border of the acromion and the 7th spinous process of the cervical spine. This procedure was performed three times and averaged to determine the patient's Pain Pressure Threshold with approximately 30 seconds rest between repetitions. Forces are measured in kPA with higher numbers indicating a greater tolerance for pressure and potentially less pain sensitivity.

Patients were tested in the prone position with a pillow under their shins to achieve approximately 15 degrees of knee flexion. A research physical therapist applies a digital algometer probe (SBMEDIC Electronics, Sweden) with a gradual increase in force at the suprascapular region contralateral to the side tested in the low back, mid-way between the posterior border of the acromion and the 7th spinous process of the cervical spine. This procedure was performed three times and averaged to determine the patient's Pain Pressure Threshold with approximately 30 seconds rest between repetitions. Forces are measured in kPA with higher numbers indicating a greater tolerance for pressure and potentially less pain sensitivity.

Participants were asked to bend forward at the waist while keeping their knees straight and attempting to touch the floor. The distance from the floor to the patient's most distal finger-tip was measured to the nearest tenth of a centimeter (cm). Participants were instructed to stop "whenever you feel you need to stop." Participants completed this procedure two times and the measures were averaged. Lower numbers indicate greater range of motion with the lowest score possible 0cm.

Participants were asked to bend forward at the waist while keeping their knees straight and attempting to touch the floor. The distance from the floor to the patient's most distal finger-tip was measured to the nearest tenth of a centimeter (cm). Participants were instructed to stop "whenever you feel you need to stop." Participants completed this procedure two times and the measures were averaged. Lower numbers indicate greater range of motion with the lowest score possible 0cm.

This study adapted a questionnaire to assess the satisfaction and acceptability of the intervention on a numerical scale from 0-10 with 10 indicating "strongly agree" and 0 "strongly disagree".

Any medical appointment in the Veterans Affairs or Department of Defense health system in which a patient sought care or was evaluated for complaints of LBP for 12-months following study enrollment according to a medical provider's electronic documentation of the visit. Subsequently, a physical therapist who was blinded to participant group allocation verified each medical encounter and then extracted all current procedural terminology (CPT) codes that were charged for each visit related to LBP. In the Military and Veterans Health Affairs, costs are estimated based on the American Medical Association and Medicare equivalents for CPT codes.

Any medical appointment in the Veterans Affairs or Department of Defense health system in which a patient sought care or was evaluated for complaints of LBP for 12-months following study enrollment according to a medical provider's electronic documentation of the visit. Subsequently, a physical therapist who was blinded to participant group allocation verified each medical encounter and then extracted all current procedural terminology (CPT) codes that were charged for each visit related to LBP. In the Military and Veterans Health Affairs, costs are estimated based on the American Medical Association and Medicare equivalents for CPT codes. CPT codes were then classified as non-invasive or invasive (surgery, imaging, or injections).