In many areas of the country the spring tennis season is about to begin. In other areas, winter still has a grip, and players are forced to stay indoors.
Whatever stage your weather or tennis season is in, everyone can benefit from off court fitness training.
There are many different ways to exercise to increase stamina and speed and to prevent injury. Elliptical machines, treadmills, jumping rope, jogging, etc. Whichever you have access to, or prefer, the important thing to remember is...train in intervals.
Interval training is simply, short bursts of high intensity exercise followed by short periods of lower intensity. For example, you might jog on the treadmill at a pace that makes you breathe too hard to talk to someone easily for 2-3 minutes and then slow to a brisk walk for about the same amount of time. Interval training mimics the patterns of exertion in a tennis match and has been proven to be a more beneficial way of exercising in general.
In summary find an exercise that you can do off the court and use interval training to get your body in shape before and during tennis season.