Exercise training has been shown to mediate acute and chronic decreases in blood pressure. Post exercise hypotension (PEH) has been deemed clinically significant, as it can be utilised by individuals with hypertension to lower BP for up to 24 hours. PEH has also been implicated in blood volume changes (Hayes et al., 2000). The current exercise guidelines for hypertension are 30 minutes of continuous low-moderate exercise five times a week. There has been a recent increase of reports in the literature supporting positive health and performance benefits following periods of high intensity exercise training (Gibala et al., 2012). However, the literature lacks clarity about whether PEH is affected by exercise intensity. Work by Hecksteden et al. (2013) implied that there was a relationship between PEH and the chronic BP reduction upon completion of a training programme. Therefore, PEH may give a prediction into the likely hypotensive benefits following a training programme. With this in mind the aim of this study was to compare the PEH response following acute high intensity interval training (HIT), modified sprint interval training (mSIT) and continuous endurance training (ET) sessions. The acute blood pressure response was compared between a HIT session (4×4 minute at 90% VO2max, with 3 minutes recovery at 50% VO2max) similar to that used by Helgerud et al. (2007), a mSIT session (60 seconds at 100% of VO2max interspersed with 75 seconds at 50% of VO2max) previously used by Little et al. (2010) and a continuous training session (CT) (30 minutes at 50% VO2max). Blood pressure was measured in 12 active normotensive participants (Age: 21 ± 1.7 years, Mass: 79.6 ± 14.7 kg, VO2max: 45.2 ± 7.5 ml/kg/min) before, during and in the 60 minutes following exercise. Changes in plasma volume were also predicted. In the 1-hr post exercise the reduction in systolic blood pressure was significantly greater following HIT (10.4mm Hg, p < 0.05) compared to mSIT (5.3mm Hg) and ET (1.6mm Hg). No differences were found in diastolic blood pressure during recovery (P > 0.05). There was no significant difference in percentage plasma volume change between the three intensities (P > 0.05). The results of this study show that exercise intensity has an effect on the PEH response, with HIT eliciting a significantly larger drop in BP than mSIT and ET. HIT decreased SBP by 9mm Hg more than ET, considering that a 2mm Hg difference in BP can be deemed clinically significant, current exercise recommendations for hypertension should expand to include HIT. Future study should focus on hypertensive individuals in a carefully monitored clinical setting.