2 个月
Top5 on MSNTop 5 Reasons Why You Should Use an Exercise Ball in OfficeUsing exercise balls instead of chairs has been ... If you want to take your mind off this issue, you can go for a hybrid ...
Tip: Hold a dumbbell or medicine ball for extra intensity ... Return to the starting position and repeat the exercise 10 times. 8. Half sit up Sit up straight with your knees bent and your ...
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