[Purpose] To investigate the effect of heel height on the distribution of plantar foot
force and heel pain in patients with a heel spur. [Subjects and Methods] Plantar force was
measured using 8 force sensors in 16 patients (3 men, 13 women), with symptomatic heel
spur for 4 heel heights (0–4 cm). Sensors were located at the hallux (T1); medial to
lateral metatarsals (M1 through M3), mid-foot (MF); and at the central, lateral, and
medial heel (CH, LH, and MH). Pain was evaluated using the minimum compression force that
caused pain and was measured using an algometer. [Results] Load bearing shifted from the
heel (CH) to the mid-foot (MF) and hallux (T1) with increasing heel height. Raising the
heel from 2 to 3 cm reduced the magnitude of load bearing, relative to the minimum
compression force for pain, by 3.70% at the LH and 2.35% at the MH. Excellent clinical
outcomes, defined by a 70–100% decrease in pain, were achieved in 10/16 participants with
the use of a 2-cm and 3-cm heel height in men and women, respectively. [Conclusion]
Increasing heel height effectively decreases the plantar force on the heel during
weight-bearing activities.