TABLES Study Method Study population Exercise Method of reporting reflux N Trained Mean age- Type N Intensity % time Symptoms years male pH ≤4 (SD/ range) N (%) Soffer pH monitoring 8 Yes 25 (20-32) 8 (100) Cycling 8 Rest Yes Yes 1993 60% VO2max 75% VO2max 90% VO2max Soffer pH monitoring 9 No 25 (20-43)* 4 (44) Cycling 9 Rest Yes Yes 1994 40% VO2max 60% VO2max 75% VO2max 90% VO2max Yazaki pH monitoring 10 Yes 20-44 8 (80) Rowing 10 Rest No Yes 1996 70% VO2max Peters pH monitoring 7 Yes 27 ± 2 7 (100) Cycling 7 Rest Yes Yes 2000 Running 70% VO2max ‡ Choi pH monitoring 12 No 27 ± 5 12 (100) Running 12 Rest Yes Yes 2003 Walking 40% MHR 70% MHR Collings pH monitoring 30 Yes 29 ± 5 27 (90) Cycling 10 Rest Yes Yes 2003 34 ± 12 Running 10 65% MHR 30 ± 7** Weightlifting 10 85% MHR
TABLES Study Method Study population Exercise Method of reporting reflux N Trained Mean age- years (SD/ range) N (%) Type N Intensity % time pH ≤4 Symptoms Soffer 1993 pH monitoring 8 Yes 25 (20-32) 8 (100) Cycling 8 Rest 60% VO2max 75% VO2max 90% VO2max Yes Yes Soffer 1994 pH monitoring 9 No 25 (20-43)* 4 (44) Cycling 9 Rest 40% VO2max 60% VO2max 75% VO2max 90% VO2max Yes Yes Yazaki 1996 pH monitoring 10 Yes 20-44 8 (80) Rowing 10 Rest 70% VO2max No Yes Peters 2000 pH monitoring 7 Yes 27 ± 2 7 (100) Cycling Running ‡ 7 Rest 70% VO2max Yes Yes Choi 2003 pH monitoring 12 No 27 ± 5 12 (100) Running 12 Rest Walking 40% MHR 70% MHR Yes Yes Collings 2003 pH monitoring 30 Yes 29 ± 5 34 ± 12 30 ± 7** 27 (90) Cycling Running Weightlifting 10 10 10 Rest 65% MHR 85% MHR Yes Yes male
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