At the beginning of the program, trunk and hip
muscle coordination and muscle endurance exercises
will be performed in a prone, supine and four-point
kneeling position. During the intervention the performance
positions will gradually become more functional
[30] and the loads increase progressively up to 50-70%
of the repetition maximum to optimize muscle strength
and muscle mass development. A subset of these exercises
will be carried out with light loads to improve explosive
force (high-velocity repetitions) and movement
control. In addition, muscle-fatiguing training will be
used for the back muscles to produce regional increases
in blood flow capacity among the muscle fibers that experience
increased activity during loading. Participants
will be instructed to perform home exercises at least 2–
3 times per week.