Research shows that
flexion exercises increased the risk of fractures by 89 % while extension exercises significantly lowered the risk of fractures to just 16 %.
Not exact matches
Deemsy explained that we wouldn't be doing any crunches or reverse crunches because those types of ab
exercises require spinal
flexion, which can
increase tension on the abdominal wall, causing the left and right sides to separate even more.
This is accomplished by pairing low rep
exercises which involve torso
flexion with planking movements to
increase time under tension.
However,
increases in muscle fascicle length are also likely dependent on the mechanical load incurred by the prime mover, as knee
flexion (hamstring only)
exercise seems to lead to greater adaptations in the hamstrings than hip extension (hamstring, gluteus maximus, and adductor magnus)
exercise, even when muscle length at peak contraction is shorter (Bourne et al. 2016).
It is suggested that this works due to the ability of the
exercise to
increase the peak eccentric force of the hamstrings at shallower angles of knee
flexion (the knee is more extended) vs. a leg curl which puts a premium on concentric force when the knee is in full
flexion.
Where
exercises display peak hamstrings EMG amplitude at different degrees of knee
flexion, this may imply that they could lead to
increases in strength and hypertrophy in different parts of the hamstring muscles.
They found
increased rectus abdominis muscle activity when performing trunk
flexion exercises with added elastic resistance from a portable device (Perfect Abs).
Patients with PL commonly have compensatory postures (FIGURE 3), including
increased cranial weight shift and
increased flexion of the lumbosacral, coxofemoral, and stifle joints.23 To address compensatory patterns, trunk - and core - strengthening
exercises are also warranted, as are massage and soft tissue mobilization techniques.