这是初学者的心肺训练挑战。务必带上水， 训练中必须补水，累了就随时歇会儿。
7workouts
10-20min
Beginner's Challenge Day 1
Beginner's Challenge Day 2
Beginner's Challenge Day 3
Beginner's Challenge Day 4
Beginner's Challenge Day 5
Beginner's Challenge Day 6
Beginner's Challenge Day 7
10-20min
