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Changes in supine–standing ratio (SSR) as percentage differences between cardiovascular parameters and HRV parameters in pre- and post-study measurements for the three groups. HFn = HF power in normalized units; LFn = LF power in normalized units; HR = heart rate; SBP = systolic blood pressure; DBP = diastolic blood pressure. † p < 0.05, vs. LEX or CON by analysis of covariance with pre-training level and age as covariates.
