Describe 10 practical ways to design learning breaks so that they promote concentration and sustainably improve learning success.

Context: [learning breaks, concentration, learning motivation, recovery, time management]

Goal: [restore energy and focus, avoid mental fatigue, use learning time efficiently, increase motivation]

For each way, explain:
1) a concrete method for designing the learning break
2) practical tips for implementation in different learning environments
3) the positive effect on concentration and learning performance

The ways should:
- be easy to understand and immediately applicable
- be suitable for different learning durations and content
- help to use breaks meaningfully and consciously
- contribute to a sustainably improved learning routine