Discuss the considerations for maintaining an intense fitness routine during pregnancy:

• Importance of consulting with healthcare providers
• Modifications for different trimesters
• Warning signs to watch for during exercise
• Benefits of staying active during pregnancy
• Potential risks of extreme fitness while pregnant
• Alternatives to high-impact activities
• Importance of proper nutrition and hydration
• Listening to your body and adjusting as needed
• Post-partum return to extreme fitness
• Success stories of athletes who maintained fitness during pregnancy

Emphasize the need for individual assessment and provide guidelines for safe exercise during pregnancy. Include expert opinions and current research findings.