Significant difference of percentage changes in HRV measures between RSA test and YY intermittent recovery test level 1
| RSA test | YY test | p Value | Power | |
|---|---|---|---|---|
| Control group | ||||
| %nVLFP (%) | 961 (132–2722)* | 455 (67–849) | 0.005 | 0.96 |
| %VLHR (%) | 136 (9–264)* | 41 (11–93) | 0.013 | 0.84 |
| Futsal group | ||||
| %TP (%) | −97.48 (97.9– −94.8)* | −92.8 (−96.4– −90.9) | 0.027 | 1 |
| %VLFP (%) | −93.99 (−98– −90.6)* | −86.5 (−93.4– −78.9) | 0.020 | 1 |
| %LFP (%) | −97.36 (−98.4– −96)* | −93.3 (−96.5– −88.6) | 0.027 | 1 |
Data are presented as median values (25–75 centile).
*p<0.05 vs YY test.
%LFP, percentage of low-frequency power; %TP, percentage of total power; %VLFP, percentage of very-low-frequency power; %VLHR, %VLFP/percentage of high-frequency power ratio; HRV, heart rate variability; nVLFP, normalised VLFP; RSA, repeated sprint ability; YY, Yo-Yo intermittent recovery test level 1.