Table 1.
Results from the validity and reliability analysis.
POWER OUTPUT
CADENCE
SRM (W)
PT P1 (W)
SEM (W)
Rho Spearman value
Bland Altman
SRM (rpm)
PT P1 (rpm)
Mean ±SD
CV
Mean ±SD
CV
Bias (W)
SD Bias (W)
Mean ±SD
CV
Mean ±SD
CV
70 CAD
SITTING
100 W
99±6
5.6%
97±4
*
4.2%
0.7
0.989
#
-2.4
4.8
LoA
(-12.1 to 7.3)
70.4±1.0
1.4%
71.7±1.1
1.5%
150 W
150±5
3.4%
148±5
3.0%
0.8
70.7±0.9
1.3%
70.7±1.0
1.5%
200 W
200±5
2.4%
198±4
2.1%
0.7
70.6±1.1
1.5%
70.9±1.1
1.5%
250 W
251±5
2.0%
248±5
1.9%
0.8
70.7±1.0
1.4%
70.8±1.0
1.3%
300 W
303±5
1.5%
300±5
1.6%
0.8
70.4±0.9
1.3%
70.9±0.9
1.3%
350 W
356±4
1.2%
352±5
*
1.4%
0.9
70.0±1.0
1.5%
70.6±1.0
1.5%
85 CAD
SITTING
100 W
101±6
5.9%
96±6
*
5.7%
1.0
0.987
#
-5.3
6.1
LoA
(-17.6 to 7.0)
84.7±0.8
0.9%
85.0±0.8
0.9%
150 W
149±6
4.0%
145±5
*
3.7%
0.9
84.7±0.8
0.9%
84.8±0.8
0.9%
200 W
201±6
2.7%
196±5
*
2.7%
0.9
84.8±0.9
1.1%
85.0±0.9
1.1%
250 W
252±5
1.9%
246±5
*
2.2%
0.9
84.8±1.1
1.3%
85.0±1.1
1.8%
300 W
303±6
1.8%
298±6
*
2.0%
1.1
84.9±1.2
1.4%
85.1±1.2
1.4%
350 W
355±5
1.5%
349±6
*
1.7%
1.0
84.9±1.0
1.2%
85.1±1.0
1.7%
100 CAD
SITTING
100 W
96±8
8.6%
91±7
*
7.2%
1.1
0.999
#
-7.3
7.9
LoA
(-23.1 to 8.4)
98.9±1.3
1.3%
99.7±1.2
1.3%
150 W
145±7
4.9%
139±5
*
3.9%
0.9
98.9±1.4
1.4%
99.2±1.5
1.5%
200 W
197±8
4.1%
191±7
*
3.7%
1.2
99.6±1.2
1.2%
99.1±1.2
1.3%
250 W
248±7
2.9%
241±7
*
2.8%
1.2
99.6±1.3
1.3%
99.7±1.3
1.3%
300 W
298±7
2.4%
291±7
*
2.4%
1.2
99.5±1.5
1.6%
99.8±1.6
1.6%
350 W
352±5
1.9%
342±8
*
2.3%
1.3
99.8±1.9
1.9%
99.7±1.9
1.9%
FC
STAND
250 W
253±7
2.6%
241±5
*
2.2%
0.9
0.927
#
-9.0
5.3
LoA
(-19.7 to 1.7)
75.9±6.1
8.0%
74.9±11.0
14.7%
350 W
352±6
1.8%
345±5
*
1.5%
0.9
74.8±9.1
12.1%
73.5±12.9
17.6%
450 W
455±8
1.7%
446±6
*
1.2%
1.0
69.6±7.7
11.1%
68.5±10.7
15.7%
FC
SIT
500 W
499±9
1.8%
492±11
*
2.2%
1.9
-7.0
3.5
LoA
(-14.1 to 0.0)
90.0±10.1
11.2%
89.8±10.5
11.7%
* Significant differences compared to the SRM device
# significant Spearman correlation coefficient; (p < 0.05).
STAND = Standing; SIT= Sitting; CAD = Cadence; FC = Free cadence; SD = Standard Deviation; CV = Coefficient of variation; rho Spearman = Spearman correlation coefficient; LoA = Limits of Agreement