only if the workout isnt progressive, level of intensity is what counts, as you get fitter you will need to increase the effort you expend to get the same benefits, but you shouldnt workout every day, you body needs to rest and recover from the workout to gain the benefits, otherwise the stress of training will slowly breakdown the body and may result in an injury, if its a cardio workout then 3 times a week and twice a week for weights a mix of both is best, aaand remember walking is the best exercize for weight loss, allmost 70% of calories lost are from fat when walking as opposed to about 40% when running, and its not too strenuous on the body so it can be done more often and for longer, hope this helps good luck.