“This wither tracing is an example of a group of horses that have been used in a dissertation to show the change in muscle bulk in the back of a horse when exercised.
The experiment was carried out over three days:
Day 1 – Lunged on both reins with no saddle
Day 2 – Lunged on both reins wearing current saddle and numnah
Day 3 – Lunged on both reins wearing LM Saddle and Shim pad
Each exercise period was preceded by a back measurement of the static horse (posture at rest) and the lifted back of the static horse (posture when the horse’s abdominal are engaged I.e. During “belly lift”). You can clearly see how after exercise with no saddle there is a small increase in the muscle, but not as much as when exercised in the wider fitting (LM) saddle and shim system. What shows very clearly is the compression of the back muscles when the horse is wearing its own (statically fitted) saddle.
This perfectly illustrates how a horse with muscle atrophy will remain the same when its saddle is fitted to its existing shape, and how that muscle can develop and recover when a remedial fitting process is used.”