What specific training techniques and drills can a cycling clinic teach to help riders optimize their power output and efficiency on the bike, ultimately leading to increased calorie burn and enhanced weight loss efforts? Additionally, how can a cycling clinics coached group rides and interval sessions be structured to push riders out of their comfort zones and into fat-burning zones, while also providing a supportive and motivating environment? Are there any specific metrics or data analysis that a cycling clinic can provide to help riders track their progress and make adjustments to their training and nutrition plans?