"band tension" refers to the level of stress or strain within a musical group or band. It describes the dynamics and relationships between the band members that can affect their overall harmony and productivity. Full definition
Once these become too easy, you can increase the resistance band tension. (onnit.com)
Moderate band tension was used on all lifts to minimise bar deceleration in the end range. (rugbystrengthcoach.com)
One of my favorites to train hip and knee stabilization is the Single Leg Standing Isometric where you add band tension around the working leg making the hip and knee muscles contract and work harder to maintain a stable position. (onnit.com)