The term cross training refers to a training routine that involves several different forms of exercise. While it is quite necessary for an athlete to train specifically for their sport if they want to excel, for most sports enthusiasts, cross-training is a beneficial training method for maintaining a high level of overall fitness. For example, you may use both biking and swimming each week to improve your overall aerobic capacity, build overall muscle strength and reduce the chance of an overuse injury. Cross-training limits the stress that occurs on a specific muscle group because different activities use muscles in slightly different ways. Cross training can help keep you motivated and interested in continuing your program, as well as stimulate greater strength gains. For optimal muscular development, variety is the name of the game. 

Benefits of Cross Training 

• Allows you to be flexible about you training needs and plans  (if the pool is closed, you can go for a run instead). 
• Produces a higher level of all around conditioning 
• Conditions the entire body, not just specific muscle groups 
• Reduces the risk of injury 
• Work some muscles while others rest and recover 
• Can continue to train while injured 
• Improves your skill, agility and balance