Should I consider wearing a back brace when walking, especially if I have a history of back discomfort or injuries? Could the utilization of a supportive device like a back brace enhance my posture and alleviate the strain placed on my lumbar region during physical activity? Might it also serve as a preventive measure against the exacerbation of chronic ailments, or is there a possibility that it could lead to reliance on external support rather than encouraging my back muscles to strengthen naturally? Furthermore, in what contexts might a back brace offer the most benefit—during casual strolls, extensive walking, or while engaging in more vigorous exercise? Could the design and fit of the brace impact its effectiveness, requiring me to choose a specific type for maximum benefit? What insights do health professionals provide regarding the balance between support and mobility when it comes to walking with a back brace? Additionally, should I take into account any potential drawbacks of prolonged usage?