1. Stay calm and take time to lower temper (if needed). 2. Respectfully explain how cheating did not occur. 3. Use evidence of not cheating if applicable in a respectful manner. 4. Pause and listen to teacher if they have anything to say in response.
If you are training resistance, then you should be lifting at two second per lift, while slowly lowering over time. This is the most efficient way to build resistance.
