This is the hardest pillar for able-bodied people to grasp. The body positivity movement was largely started by fat, queer, and disabled activists. For a person with a chronic illness, "wellness" cannot mean being free of illness. It means thriving within limits.
Focus on behavioral changes only. If weight changes as a side effect of joyful movement and gentle nutrition, that is fine. But if you focus on the scale number, you will likely abandon the behaviors the moment the number stalls (which it will, because bodies have set points).
This toxic cycle created a paradox where the pursuit of health actively harmed mental health. Individuals experienced high levels of cortisol (the stress hormone) due to body shame, which counteracted the physiological benefits of their wellness routines. The realization that health cannot exist without psychological peace sparked the integration of body positivity into mainstream wellness. Pillars of a Body-Positive Wellness Lifestyle