Within the music week, three HRV parameters differed significantly between M1 and M2. STDRR (time domain variable) was significantly lower in M2 compared to M1 in Group B (AM and PM P b 0.05) with a similar trend (P = 0.077) in Group A in the morning. RRTI was also observed to be significantly lower in M2 compared to M1, in Group A (AM Pb0.005,PMb0.05)andGroupBAMPb0.01,PMPb0.05.SD2 decreased significantly between M1 and M2 in both groups regardless of thetimeofday(GroupA,AMandPMPb0.05;GroupB,AMPb0.01 and PM P b 0.05).