Am I getting benefit out of jogging for only 20 minutes?

Am I getting benefit out of jogging for only 20 minutes?I started going back to the gym to run on the treadmill (I have knee pain and plantar fasciitis, and the treadmill is much friendlier). The first week I did a quick 15 minutes 3 days a week just get myself in the habit, and then did 20 minutes. I use a heart rate monitor to stay in the aerobic zone M,W,F, and an active recovery on the other 2 days. I used to have a bad problem with going out too hard and burning myself out, and injuring myself. I seem to remember some folk wisdom about needing 30 minutes or some such to actually reap any cardiovascular improvement. I plan on moving up to 25 minutes and 30 minutes eventually, but even keeping my heart rate in check with walk breaks, I'm pretty spent by the 20 minute mark. Am I just being a giant pussy? submitted by /u/craftingfish [link] [comments]

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