Eccentric Contractions: Predictions of the hypothsesis

Non-uniform sarcomeres should be apparent in fibres after an active stretch at long length, provided that they can be observed without allowing relaxations, and at sufficient resolution to see individual sarcomeres in individual myofibrils.
The number of such sarcomeres should be sufficient to account for most of the applied stretch.
Such sarcomeres should be absent in fibres contracted while isometric, or stretched over the ascending limb of the length tension curve.
Such non-uniformitie should develop during the stretch, not during activation, not during the fall in tension atthe end of stretch, and not during fixation.

The shift in the length tension curve, and the accompanying other changes reported by Katz, should be apparent for other muscles.
It should only occur after contractions that include the descending limb of the length tension curve.

Eccentric exercise training should lead to more sarcomeres in muslce fibres than equivalent concentric training. This should be apparent by histology and by modification of the length tension curve.
Eccentric training should lead to less damage for testing over the same range of angles.
If extra sarcomeres are the only effect of training, then stretching over the same range of sarcomere length should lead to the same amount of damage, independent of training or fibre type.