Leon Cameron says young GWS Giants will be put through toughest pre-season yet Adam Tomlinson won the GWS Giants" 3km time trial in the club's first pre-season training session. Picture: Mark Evans Source: News Limited IF the Giants young guns think pre-season training has been tough so far they're in for a rude surprise, with coach Leon Cameron declaring this one will be the hardest yet. Adam Tomlinson wins the GWS Giants 3km time trial. GWS began its gruelling program on Wednesday with a 3km time trial at Sydney Olympic Park. Adam Tomlinson won the trial, with Josh Kelly and Tomas Bugg close behind. "It will be the toughest pre-season no doubt," Cameron told The Daily Telegraph. We've had to be mindful of young bodies and not to push them too hard too early. It's a natural progression from where we've come from. We've increased the workload year after year, from the first, second and third seasons the building blocks are in place for the biggest yet. For Cameron, first impressions count and what he saw on the athletics track was encouraging. As well as Tomlinson, Kelly and Bugg, key forward Jeremy Cameron produced one of his best 3km time trials. "Jeremy is in great nick," Cameron said. He had a difficult season with injuries last year and he, along with a lot of players, made a statement with the way they presented themselves. He and a lot of his teammates are now in their fourth years in the AFL and are a bit older, wiser and more professional with what they do. They also understand what is required to be an AFL footballer and they make smarter decisions on and off the field. Adam Treloar and other GWS Giants first to fourth-year players returned to training on Wednesday. Cameron is one of a host of Giants players who is out of contract at the end of the 2015 season, including Tomlinson, Adam Treloar, Dylan Shiel and Devon Smith. Despite losing No. 1 draft pick Tom Boyd during the trade period, the GWS coach is quietly confident of retaining his young stars. "It will take care of itself," Cameron said. Some will sign quickly and some will take their time, everyone has their own decision to make. GWS Giants players set off for the pre-season 3km time trial. They will ask themselves do they want to be part of something special. We are building that at this club bit by bit, making it better piece by piece. Ruckman Andrew Phillips has re-signed until the end of 2017. After a hamstring injury all but destroyed his 2013 season, the Tasmanian worked his way back to fitness this year and will have plenty of opportunities next year with the departures of Boyd and Jonathon Giles. The Giants were one of 10 teams who missed this season's finals and started back training on Wednesday. Under the Players" Association collective bargaining agreement, the other finals teams return according to what stage they dropped out of the competition. Originally published as Gruelling summer awaits young Giants