RESULTS	During the PF session , the rescuers performed CPR with higher compression rates ( 156.8 vs 101.6 cpm ) , more compressions ( 787.2 vs 510.8 per 5 minutes ) , and more duty cycles ( 51.0 % vs 41.7 % ) , but a lower percentage of effective compressions ( 47.7 % vs 57.9 % ) and a lower compression depth ( 35.6 vs 38.0 mm ) than they did during the 100-cpm session .\