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![What are Yasso 800s and why you should include them in your training [Follow Along - Week 4] - Middleagemarathoner.com](https://middleagemarathoner.com/wp-content/uploads/2018/05/Training-Info-Quiz.jpg "What are Yasso 800s and why you should include them in your training [Follow Along - Week 4] - Middleagemarathoner.com")
What are Yasso 800s and why you should include them in your training [Follow Along - Week 4] - Middleagemarathoner.com
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Yasso 800 :: The Marathon Pace Workout with a Twist
