I agree with the previous statement that p90x is a great video series. I think what I have learned from that series is to use many of the exercises you listed to really focus on core muscle groups and to work on them simultaneously. Also they do focus a lot on Yoga which can really help with balance, flexibility and core strength. So even if p90x is not for you I would still look into a yoga video to alternate with your current work out. Anyways any exersises that help with core muscles, flexibility and balance will really pay off on the disc golf course.
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