I think it would be also good to explain why the blood pressure rises and why then it drops after we release Valsalva maneuver.

That's a really good question.

So when you inhale and then try to forcefully exhale, it causes big swings and pressure within the thoracic cavity.

And so when you perform the Valsalva maneuver, the pressure increases inside the thoracic cavity and it pushes blood out into the periphery.

And so you get this brief spike in blood pressure.

If you then hold that strain, you're increasing the pressure in the thoracic cavity and it makes it harder for blood to come back into the thoracic cavity and back to the heart because blood just moves down a pressure gradient.

But if you increase the pressure in the thoracic cavity, it's harder for that blood to actually get back in and return to the heart.

Now, could you elaborate a little bit on the protocols? So you said 60%, but how many reps? Were there any warm-ups? How the resistance training session was run? And then how the Valsava maneuver applied into it in the middle group, the combined group?