3. Results
3.1. Mean heart rate & mean R–R interval
The mean R–R interval and heart rate observed across the groups within the study are summarised in Table 1. Within the silent week (S1 vs S2), a statistically significant difference (P b 0.05) was only ob- served in one of the four recording periods, namely Group A's, afternoon recording, where an increase was seen in the R–R interval. As might be expected, this difference was accompanied by a statistically significant (P b 0.05) decrease in μHR. Within a music week (M1 vs M2) there were no significant differences in μRR or μHR between M1 and M2 in either group in the morning or afternoon recording sessions.