Mike Brown: top-level rugby will take an even bigger toll on young players

• ‘It’s going to be harder for them than it has been for me’ • Quins full-back has barely stopped since June and faces Exeter on SaturdayMike Brown has warned the physical and mental demands of playing rugby at the top level will take a worrying toll on players coming into the international game at a young age.Brown, the Harlequins full-back, has been on the field this season for more minutes than any other England player who was involved in the World Cup but believes the fact he did not become an England regular until he was 26 has helped prolong his career. Related: Alex Corbisiero: ‘Even no…