as a former heifer (oh yes 12.5 stone and size 16!!!) and now a trim size 6/8 triathlete i would recommend starting on mid weights with lots of reps (3 sets of 10-12) weights for about three weeks,especially resistance machines as these have a longer effect on burning calories. When you have been kick started this way begin some cardio, about 30 mins three times a week. spinning is good and circuits and boxing. up your weights and lower reps when weight starts to shift. you can bulk and cut weight at the same time, as long as you do your cardio first then your weight session after. also pay at