What Ozempic and GLP-1 Drugs Do to Your Triathlon Performance

GLP-1 medications like Ozempic, Wegovy and Mounjaro are now firmly inside the triathlon conversation. Athletes are seeing dramatic weight loss results and wondering whether these drugs could help them perform better too.

But what actually happens when you combine appetite-suppressing medications with the demands of swimming, riding and running for hours every week?

In this episode, Advanced Sports Dietitian Taryn Richardson breaks down the science and practical realities of GLP-1 medications for endurance athletes. From muscle loss and gut issues to RED-S and race day fuelling disasters, this is the conversation triathletes need to hear before considering these medications.

In this episode, you’ll learn:

• What GLP-1 medications actually do in the body

• Why delayed gastric emptying can become a major issue for endurance athletes

• The surprising amount of muscle mass that can be lost during rapid weight loss

• How GLP-1 medications may increase the risk of RED-S in triathletes

• Why hunger and thirst cues become unreliable on these medications

• The key nutrition strategies to protect your performance if you’re taking a GLP-1

• How protein and resistance training can help preserve lean muscle mass

• Which foods give you the biggest micronutrient bang for buck when appetite is low

• Why fuelling to a schedule becomes critical during long training sessions and racing

• What WADA’s monitoring of GLP-1 medications means for athletes moving forward

Key Takeaways

• Rapid weight loss can come with significant lean muscle loss if nutrition and strength training aren’t prioritised

• Slower gastric emptying may increase the risk of gut distress during training and racing

• Suppressed appetite can make chronic under-fuelling and RED-S much harder to detect

• Triathletes taking GLP-1 medications need a very deliberate fuelling plan to maintain health and performance

Timestamps

• 00:00 – Why GLP-1 medications are suddenly everywhere in triathlon

• 01:47 – What GLP-1 medications actually do

• 03:00 – WADA monitoring and anti-doping implications

• 04:09 – The muscle mass problem triathletes need to understand

• 06:34 – Gut function, gastric emptying and fuelling challenges

• 08:50 – The hidden risk of RED-S and chronic under-fuelling

• 11:13 – Practical strategies for athletes using GLP-1 medications

• 12:35 – The most nutrient-dense foods when appetite is low

• 14:00 – Why fuelling to a schedule matters

• 16:00 – Final takeaways for triathletes

If you know a triathlete currently taking Ozempic or another GLP-1 medication, send them this episode. These conversations are happening quietly in squads all over the world, and athletes deserve practical, evidence-based guidance to protect both their health and performance.

Links & Resources

• Triathlon Nutrition Kickstart Course

• Join the waitlist for the Triathlon Nutrition Academy

• Free Triathlon Nutrition Checklist

Download the FREE audio series The 5 Biggest Nutrition Mistakes Costing You Time on Race Day

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