I've recently joined gym .... (light weights, then 4 cardio machines)
on the treadmill, I started walking at a pace of 6km/hr for 10 min
every week, I have increased the pace and increased the duration by 1min
am now in the 5th week, and am walking at a pace of 7km/hr for 13 minutes ... any faster, and I will have to start jogging
will keep the pace at 7km/hr until 20 minute durations, then hopefully I will be able to jog the full 20 minutes (on the treadmill I train on, 8km/hr is a jog ... must however say that 7km/hr walking seems a lot harder than jogging at 8km/hr ... )
have been loosing 2kg/week and hopefully would have lost enough weight so that when I start jogging, I do not cause any knee injuries etc
However, I find the elliptical trainer to be a very good machine as there is not much strain on knees/ankles and gives a very good workout