425,717 views
45 votes
45 votes
Answer this one please

Answer this one please-example-1
User Mayank Agarwal
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2 Answers

21 votes
21 votes
D. vary the intensity and duration of the exercise
User Whatupwilly
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2.6k points
16 votes
16 votes

answer: D

Step-by-step explanation:

step by step.......

User Rajkumar K
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