resistance exercise can modify cardiovascular responses of professors during teaching and sleep

Background: both work activity and reduced nocturnal decrease in blood pressure (bp) are related to higher cardiovascular risk. objectives: the aim of the present study was to assess the blood pressure and autonomic responses of university professors during teaching and sleeping periods after different resistance exercise (re) intensities. methods: ten normotensive professors (33.6 ± 3.4 years, 82.4 ± 12.4 kg; 177.0 ± 7.5 cm; 26.2 ± 3.2 kg/m^2 ) randomly underwent control (cont) and re before initiating their daily activities. re consisted of a circuit training lasting 40 minutes at 40% and 80% of one repetition maximum test (40% 1rm and 80% 1rm). systolic bp (sbp) and diastolic bp (dbp) as well as heart rate variability indicators in the time (rri) and frequency domains (lf, hf, lf:hf ratio) were evaluated while resting and 24 hours after the sessions. the average day-period (dp), night-period (np) and nocturnal bp fall (%nbpf) of sbp and dbp were calculated. results: during teaching, sbp (cont: ∆ = 8.1 ± 9.1 mmhg; 40% 1rm: ∆ = 10.8 ± 10.5 mmhg and 80% 1rm: ∆ = 10.3 ± 7.9 mmhg; p < 0.01) and dbp increased (cont: ∆ = 8.0 ± 9.9 mmhg; p < 0.05). in sleep, sbp (cont: ∆ = -14.8 ± 5.9 mmhg and 40% 1rm: ∆ = -13.1 ± 6.0 mmhg; p < 0.001) and dbp decreased (40% 1rm: ∆ = -12.9 ± 6.2 mmhg and 80% 1rm: ∆ = -12.3 ± 3.6 mmhg; p < 0.001), rri and hf increased (p < 0.01) and lf and lf:hf ratio decreased (p < 0.01) after cont, 40% 1rm and 80% 1rm, while the class period did not change in different sessions (p > 0.05). dbp showed different results to 40% 1rm (nt: 58.8 ± 5.1 mmhg and %nbpf: -24.2 ± 3.4 %; p < 0.05) when compared with cont (nt: 61.9 ± 5.2 mmhg and %nbpf: -18.2 ± 4.5%; p < 0.05) and 80% 1rm (nt: 63.2 ± 5.9 mmhg and %nbpf: -18.1 ± 4.9%). conclusions: re at 40% 1rm and 80% 1rm attenuated dbp values of subsequent teaching, however only 40% 1rm promoted better nt-bp and %nbpf values in university professors.