Exercise // Thinker: Does Your Exercise Work?
It really is a preposterous question. In the most charitable view, it is a question that requires more questions.
Does your exercise make you feel good? And, does it do so in the short- and long-term?
Do you enjoy your exercise experience?
Do you have even a surface-level understanding of why you are exercising in a certain way?
Are you getting any closer to your stated exercise goals? Do you have any stated exercise goals?
There is a lot of potential "working" and "not working" embedded in your answers here (and there are certainly more questions that could be asked along this same vein). In my experience, they are important questions because you are exchanging time and physical resources for your exercise efforts.
You should rightly expect a return - a specific, aimed, right kind of return - on that investment.