So I need to lose about 3 stone and I'm not sure whether it would be best to start the gym or start running. I've thought about doing couch to 5k but wasn't sure if it would take longer to lose weight. I'm really unfit at the moment so not only am I looking to lose the weight I also really need to build up my fitness. I know it will probably come down to personal preference but wondered what other people's thoughts are on the pros and cons really