Comparing the Activity Profiles of Wheelchair Rugby Using a Miniaturised Data Logger and Radio-Frequency Tracking System

Figure 4

Mean ± SD values for the time spent (a) and distance covered (b) in 8 arbitrary speed zones by each device. The overlaying line graph represents the random error (reported as a % of the mean value). Note that random errors were not calculated for zones 7 and 8 due to insufficient data in these zones for MDL-5. Zones are defined as follows: 1 (0--0.5 m·s⁻¹), 2 (0.5--1.0 m·s⁻¹), 3 (1.0--1.5 m·s⁻¹), 4 (1.5--2.0 m·s⁻¹), 5 (2.0--2.5 m·s⁻¹), 6 (2.5--3.0 m·s⁻¹), 7 (3.0--3.5 m·s⁻¹), and 8 (3.5--4.0 m·s⁻¹).

(a)

(b)