Cross-training (Also known as conditioning) refers to training in different ways to improve overall performance. It takes advantage of the particular effectiveness of each training method, while at the same time attempting to neglect the shortcomings of that method by combining it with other methods that address its weaknesses.
Cross-training in sports and fitness refers to the combining of exercises to work various parts of the body. Often one particular activity works certain muscle groups, but not others, Cross-training aims to eliminate this. Jogging, for example, is excellent for endurance, and prolonged use of the large muscle groups in the legs. A jogger may lift weights in order to build muscle and increase upper body strength, things that running cannot provide.

Benefits of Cross Training:
Reduced risk of injury. By spreading the cumulative level of orthopedic stress over additional muscles and joints, individuals are able to exercise more frequently and for longer durations without excessively overloading particularly vulnerable areas of the body.

Enhanced weight loss. Individuals who want to lose weight and body fat should engage in an exercise program that enables them to safely burn a significant number of calories.

Enhanced exercise adherence. Research on exercise adherence indicates that many individuals drop out of exercise programs because they become bored or injured. Cross training is a safe and relatively easy way to add variety to an exercise program. In the process, it can play a positive role in promoting longterm exercise adherence by reducing the incidence of injury and eliminating or diminishing the potential for boredom.