Berthelot et al. ( 2008 ) suggested that the next generation would reach the physiological limit of human performance in sports .
Berthelot et al. ( 2008 ) predicted that half of all world records would improve only by 0.05 % or less by 2027 .
Berthelot et al. ( 2008 ) suggested that the next generation would reach the physiological limit of human performance in sports , and predicted that half of all world records would improve only by 0.05 % or less by 2027 .