I completed 30DS in June with no other exercise...I wanted just to see the results I'd get with 30DS alone w/my diet...I only lost like 4-5lbs, but lost SEVERAL inches!!!! and IMO I think using it as for toning/strength training is a perfect idea...you don't get much of a cardio WO from 30DS, but it's def. good for toning!! I've actually just started 30DS again and plan to do it every other day, alternating between the levels...PLUS add cardio either with walkin/running on TM or my recumbent...you will def. be sore after 30DS, but if you've been working out regularly, you shouldn't be TOO sore...I don't run long distance, but I wouldn't think running on the same day as you do 30DS could hurt...try it out and if it doesn't work, then start alternating days....hope I could help
