To prevent an Achilles tear, it's important to keep an eye out for early warning signs. If the Achilles tendon is sore or aches, be sure to rest it immediately. Slow, basic stretching before exercise will also help prevent an Achilles tear. Try a calf stretch or a plantar fascia stretch. Additionally, you should always wear shoes with good arch support and cushioning for the heel. If possible, try to avoid running on hard surfaces or exercising outside in cold weather.