Tension can be good.
In Chess, tension arises when two pieces build pressure on each other. GM Avrukh talks about favourable tension in this hour long masterclass.
Examples and illustrations, PGN files available for paid subscribers.
Recording of 52 week course taken by GM Mihail Marin
40 hours of 1-1 sessions with GM Kristzian Szabo
1-1 personalised sessions for advanced level players (FIDE Rating: 1800-2100).