character: Mr. Alex Brown
topic: Understanding Heart Rate and Training Intensity
grade: 10
subject: Biology
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character: Mr. Alex Brown
topic: The Role of Heart Rate in Physical Fitness
grade: 10
subject: Biology
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character: Mr. Alex Brown
topic: How to Calculate Training Zones Based on Heart Rate
grade: 10
subject: Biology
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character: Mr. Alex Brown
topic: Effects of Exercise on Heart Rate and Health
grade: 10
subject: Biology
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