Not so tight they cut blood flow, more tight enough to not rotate when pedaling.
Depending on type and fit it's not unheard of for pads to rotate on impact, as long as they stay in place (as in elbow/forearm don't move up or down your arm) you still get protection.
Like helmets you really want to test fit first. Dianese gear never fitted me, regarded by many as the best, Raceface/Roach armour like a glove on me :)
Not so tight they cut blood flow, more tight enough to not rotate when pedaling.
Depending on type and fit it's not unheard of for pads to rotate on impact, as long as they stay in place (as in elbow/forearm don't move up or down your arm) you still get protection.
Like helmets you really want to test fit first. Dianese gear never fitted me, regarded by many as the best, Raceface/Roach armour like a glove on me :)