Masanori Kamiue, MS, Akio Tsubahara, MD, DMSC, Tomotaka Ito, PhD, Yasuhiro Koike, MS
Jpn J Compr Rehabil Sci 15: 49-57, 2024
Objective: To verify the effects of repetitive peripheral
magnetic stimulation (rPMS) on knee joint extensor
strength and motor ability in older adults receiving day
services.
Methods: Thirty Hz rPMS using Talent Pro was
applied to the bilateral vastus lateralis, vastus medialis,
and rectus femoris of 12 older persons (mean age
83.8 +- 4.5 years) attending a day service center and
receiving functional training by a physical therapist.
The intervention was performed for 20 minutes per
day, three times per week, for a total of 4 weeks.
Evaluations before and after the intervention included
maximum voluntary contraction (MVC), knee extensor
torque induced by rPMS (rPMS-induced torque), pain
(visual analog scale: VAS), thigh circumference,
comfortable 5-m walking time, 30-second chair-stand
test (CS-30), Timed-Up-and-Go Test (TUG), and
Functional Reach Test (FRT). MVC and rPMS-induced
torque were measured using the m-Tas F-1.
Results: MVC significantly increased in both lower
limbs after the intervention (right/left: 72.4 +- 23.5
Nm/72.9 +- 23.0 Nm) compared with immediately before
the intervention (right/left: 59.9 +- 17.2 Nm/64.5 +- 21.0
Nm). No significant changes were observed in MVC
between one month before the intervention and
immediately before the start of the intervention, and
between the end of the intervention and one month after
the end of the intervention. rPMS-induced torque, TUG,
and CS-30 improved significantly after the intervention
compared with immediately before the intervention.
Conclusion: Intervention using rPMS increases MVCand
rPMS-induced torque and improves motor ability
in older adults. Because rPMS is a simple means of
increasing muscle strength, it is expected to be widely
used in the future.
Key words: repetitive peripheral magnetic stimulation, knee extensor torque, older persons, muscle strengthening, motor ability