I run every day for at least 3 miles.besides lifting weights 5 days a week I do jumping jacks, up-downs and jump roping.I love running, but it seems doing the jumping jacks, updowns and jump rope arent doing anything for me as far as increasing my endurance, I can basically do these things all day and I dont get much of a workout from them anymore at a high intesity like ive hit a plateau plateau or something. What is a good Cardio/Endurance workout besides that, that will really give me a challenge and further my Endurance???
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