Describe 10 practical approaches that athletes can use to specifically improve their posture during strength training in order to prevent injuries and enhance training performance.

Context: [strength training, posture, injury prevention, training optimization, fitness, muscle building]

Goal: [correct execution of exercises, improved muscular balance, sustainable joint protection, increased training efficiency]

For each approach explain:
1) a concrete technique or exercise to improve posture during strength training
2) practical tips for integration into training and self-monitoring
3) the expected positive effect on posture, safety, and performance

The approaches should:
- be easy to understand and directly applicable
- be suitable for both beginners and advanced athletes
- address common sources of error in strength training
- help to train healthily and effectively in the long term