(HealthDay News) -- Resistance exercises strengthen your bones and muscles, but it's easy to overtrain and cause injury.

The American College of Sports Medicine offers these suggestions to avoid overtraining:

• Include at least one recovery day each week.
• Alternate your exercises.
• Don't increase both frequency and intensity of exercises at the same time, and make sure that you don't increase either too quickly.
• Don't repeat exercises for long periods without any variation.

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