While exercise is beneficial for overall health, there are potential downsides when solely relying on it as a means to lose weight. Firstly, it's common to overestimate the number of calories burned during exercise, leading to unrealistic expectations. This can result in frustration or discouragement if weight loss goals aren't met. Additionally, intense exercise regimens can increase appetite, leading to compensatory eating that offsets the calorie deficit. Also, focusing on exercise for weight loss neglects the importance of nutrition and overall lifestyle habits. It can also lead to burnout or injury if not approached with caution and proper rest. It's important to adopt a holistic approach, combining exercise with a balanced diet and lifestyle changes for sustainable weight loss.