Tyre Volume and Pressure Effects on Impact Attenuation during Mountain Bike Riding
Table 4
Mean ± SD for movements separated for low (<5 Hz) and high (>5 Hz) power.
Accelerometer position
CycloXking tyre
2.2′′ XKing tyre
2.4′′ XKing tyre
3-way ANOVA
Low PSI
Mod. PSI
High PSI
Low PSI
Mod. PSI
High PSI
Low PSI
Mod. PSI
High PSI
Low power
handlebar
7.6020 ± 0.372
7.3377 ± 0.730
7.3461 ± 0.722
7.9999 ± 0.706
8.0373 ± 0.601
7.8545 ± 0.667
7.7180 ± 0.535
8.1915 ± 0.921
7.3545 ± 0.496
Tyre A.Loc Tyre A.Loc PSI A.Loc
Wrist
11.1012 ± 1.433
11.1016 ± 0.798
10.8242 ± 0.665
11.2274 ± 0.783
11.3173 ± 0.791
11.1153 ± 0.940
10.7093 ± 0.831
11.2719 ± 1.111
11.1709 ± 1.481
Ankle
8.8034 ± 1.286
8.7661 ± 1.574
9.1143 ± 1.504
8.5389 ± 1.556
8.5304 ± 1.367
9.3778 ± 1.228
8.6588 ± 1.851
7.7914 ± 0.866
8.9735 ± 1.555
Seat post
7.0221 ± 0.892
6.9096 ± 1.130
6.9559 ± 1.100
7.7862 ± 0.844
7.7408 ± 0.802
7.6287 ± 0.682
7.4695 ± 0.979
8.1789 ± 1.595
7.5053 ± 0.870
Lumbar
2.2323 ± 0.428
2.2711 ± 0.431
2.2088 ± 0.555
2.3851 ± 0.393
2.3896 ± 0.385
2.4398 ± 0.512
2.1917 ± 0.240
2.1500 ± 0.199
2.2178 ± 0.242
Forehead
1.6805 ± 0.125
1.5723 ± 0.205
1.6235 ± 0.241
1.7659 ± 0.225
1.7505 ± 0.263
1.5788 ± 0.168
1.7763 ± 0.460
1.6319 ± 0.482
1.6620 ± 0.461
High power
handlebar
30.9527 ± 1.084
31.6942 ± 2.200
31.9095 ± 1.144
31.3476 ± 1.695
32.5003 ± 2.085
32.8681 ± 1.642
30.9170 ± 2.816
32.5744 ± 2.808
33.8956 ± 2.025
PSI A.Loc Tyre PSI Tyre A.Loc PSI A.Loc
Wrist
31.0326 ± 1.761
31.1862 ± 1.944
31.9101 ± 1.745
30.8851 ± 1.646
30.7399 ± 1.588
32.4736 ± 1.858
31.1031 ± 1.634
32.5217 ± 2.201
32.0763 ± 1.001
Ankle
32.0164 ± 2.753
30.7261 ± 1.813
30.8363 ± 1.935
29.4291 ± 1.562
29.7999 ± 1.962
31.1927 ± 1.746
29.9579 ± 4.112
28.7204 ± 1.748
32.5210 ± 2.184
Seat post
34.3183 ± 2.782
33.9910 ± 2.618
33.7490 ± 1.946
31.1456 ± 2.294
32.4106 ± 2.048
33.9546 ± 1.909
30.6605 ± 4.610
32.4129 ± 3.564
34.3646 ± 2.565
Lumbar
5.4080 ± 1.260
5.5831 ± 0.971
5.4496 ± 1.139
5.3255 ± 1.334
5.4598 ± 1.212
5.4818 ± 1.212
4.8842 ± 0.432
4.6912 ± 0.481
5.3320 ± 0.485
Forehead
5.5814 ± 1.397
6.2502 ± 0.620
5.8694 ± 0.998
4.9398 ± 1.083
5.0786 ± 1.423
5.3796 ± 1.525
5.7876 ± 1.741
4.6845 ± 0.808
5.9633 ± 1.570
Where tyre (tyre size), PSI (tyre inflation pressure), and A.Loc (accelerometer location) refer to the main effect for power band. Tyre A.Loc refers to the two-way interaction between tyre size and accelerometer location. denotes significance (); (); () (); signifies a post hoc difference () for low power when compared to cycloXKing tyre size; ⊗⊗⊗⊗ signifies a post hoc difference () for tyre inflation pressure when compared to Low PSI and () compared to High PSI.