Are you doing the same routine over and over again, day in and day out? Does your workout today look the exact same as it did the first day you tried it? If so, you may be missing out on some fitness promoting benefits that you can only receive by changing up your routine on a regular basis.In fact, here are three of the top reasons you should change your fitness regimen systematically over time:You’ll get bored. While becoming uninterested in your workout sessions won’t hurt you per se, these types of feelings have the capability of turning you off to exercise altogether. What happens then? You quit doing any sort of physical activity and soon your health (and waistline) starts to suffer.Your fitness stalls. The only way to build muscle and endurance is to continue to test your body. However, if you put it through the same routine every day, it acclimates to the exercises and doesn’t grow at all. Your fitness becomes stagnant and you wonder why you’re putting in a lot of time and effort only to get minimal results.To work more muscle groups. One of the benefits to changing your exercises every so often is that you’ll work a larger number of groups of muscles. This will give you better overall fitness and greater muscle tone.Ideally, you want to change your fitness routine every 60 to 90 days. Experiment with different activities that you enjoy and change your strength training exercises so that you incorporate different muscle groups.Not only will you decrease your likelihood of getting bored and giving up, but you’ll also see greater gains in your fitness. That is why you’re working out, right? To get fit?