What are the most effective strategies for mitigating the performance impacts of cold wind on a road bike, and how can riders optimize their gear, bike setup, and riding technique to minimize aerodynamic drag and maintain efficiency in windy conditions? What specific modifications or accessories can be made to a road bike to improve its wind resistance, and what are the relative benefits and drawbacks of each approach? Are there any particular techniques or training methods that can help riders build the endurance and strength needed to maintain a high pace in windy conditions, and what role do factors like core strength, leg strength, and cardiovascular fitness play in this regard?