Table 3 Intraclass correlation coefficients (ICC, two-way, random, single measure) with 95 % confidence interval for speed, stride length, cadence and stride time for each slope and walking

 Slow speed

.953 (.883–.981)

.897 (.746–.958)

1.000 (1.000–1.000)

1.000 (.999–1.000)

 Normal speed

.985 (.964–.994)

.954 (.886–.981)

1.000 (1.000–1.000)

1.000 (1.000–1.000)

 Fast speed

.944 (.863–.977)

.914 (.789–.965)

.975 (.937–.990)

1.000 (.999–1.000)

 Slow speed

.937 (.836–.976)

.763 (.417–.904)

1.000 (1.000–1.000)

1.000 (1.000–1.000)

 Normal speed

.991 (.976–.996)

.727 (.327–.889)

1.000 (1.000–1.000)

1.000 (1.000–1.000)

 Fast speed

.951 (.881–.980)

.833 (.597–.931)

.999 (.997–.999)

1.000 (1.000–1.000)

 Slow speed

.995 (.986–.998)

.968 (.913–.988)

.945 (.852–.979)

.941 (.843–.978)

 Normal speed

.980 (.949–.992)

.804 (.506–.923)

.977 (.943–.991)

.981 (.951–.992)

 Fast speed

.952 (.871–.982)

.833 (.552–.937)

.953 (.873–.982)

.972 (.925–.990)

 Slow speed

.999 (.997–1.000)

.866 (.651–.948)

.960 (.896–.985)

.959 (.895–.984)

 Normal speed

.999 (.998–1.000)

.932 (.823–.974)

.946 (.860–.979)

.927 (.810–.972)

 Fast speed

.971 (.930–.988)

.928 (.826–.970)

.975 (.940–.990)

.972 (.933–.988)

 Slow speed

.995 (.988–.998)

.945 (.868–.977)

.955 (.892–.981)

.944 (.866–.977)

 Normal speed

.990 (.977–.996)

.960 (.904–.983)

.976 (.941–.990)

.982 (.956–.992)

 Fast speed

.991 (.978–.996)

.956 (.895–.982)

.988 (.971–.995)

.984 (.960–.993)

 Slow speed

.996 (.991–.998)

.908 (.779–.962)

.935 (.843–.973)

.930 (.831–.971)

 Normal speed

.993 (.983–.997)

.928 (.827–.970)

.946 (.870–.978)

.925 (.819–.969)

 Fast speed

.996 (.991–.998)

.962 (.909–.984)

.972 (.933–.988)

.970 (.927–.987)