i am 40 yrs. old and have started daily treadmill walking. is it okay to go 30mi!
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To have a healthy heart, you need to get your heart beats per minute up over 150 or so and keep it there for 20 minutes. Try to do this 4 or 5 times each week.
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30 minutes is exactly right for a great cardio workout. This is provided that you've checked with your MD, and he has given you the go ahead for your exercises program. I'm cheering for you! It is a move in the right direction for fitness, and to stave off "old age".
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