India, Jan. 15 -- London (dpa) - The estimated 280 million people worldwide who suffer from depression could have a treatment option that is not only cheaper than therapy and antidepressents, but that also makes them fitter and stronger. That's according to researchers from the UK's University of Lancashire, who have concluded that exercise has "a similar effect on depressive symptoms" to therapy, following an examination of 73 randomized control trials involving around 5,000 patients. Moderate-intensity exercise appears to be the best option for patients who want to use working out as a substitute for therapists or meds. But the rigor needed depends in turn on the patient's level of fitness. "Our findings suggest that exercise appears to b...