hi everyone,im looking for a bit of advice about staying fit.Since january i have been running 3 or 4 times a week and lost nearly 2 stones.I am now finding it difficult to find the time for 4 runs a week and was wondering if 1 or 2 runs a week would be enough to maintain a decent level of fitness(im doing 12 miles every sunday and last week managed it in 1 hr 30 mins).Is this alone enough to stay fit?????