Example of overloads on the Achilles tendon
| Type of overload | Example |
|---|---|
| Single high-intensity session | Repeated uphill running, |
| Increased frequency of training | High-load training more than five times a week |
| Different drills | Rapid introduction of plyometric training |
| High loads when fatigued | Sprints at the end of training |
| Change in footwear | Shoes that provide less support, or stiff soles, shoes that mandate a forefoot strike or have a lower heel wedge |
| Change in surface | Running in soft-sand, running on uneven surfaces |
| Training with muscle stiffness | Training sessions following heavy-weight session |