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Old 07-22-2012, 08:12 AM   #200
iroc's Avatar
Join Date: Aug 2009
Posts: 5,371

No, I haven't. I did a few days of level 3, and the jumps were too high intending my back. Having a bad back, I get scared quick when my back starts hurting. I waited a week before I started on the treadmill.

I've been doing the 5 min walk/5 min run interval for 40 minutes daily (minus yesterday).

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