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Evaluation of a movable headrest add-on for a passive shoulder assist device, targeting the neck strain that shoulder-only exoskeletons ignore during face-up overhead work: 5 males performed static overhead holds and a 10-minute simulated fruit-harvesting protocol while deltoid and sternocleidomastoid EMG and muscle stiffness were measured across headrest variants (Wearable Technologies, 2022). Data from the corresponding author on reasonable request.

Details

Subjects

n = 5 · 5M · 22.8 ± 1.2

Setting

Laboratory (controlled or simulated)

Protocol / load

Static overhead holds (135° flexion / 90° abduction) with 1.25-5 kg dumbbells; 10-min simulated fruit harvesting with 1.25 kg dumbbells

Equipment

Surface EMG at 1 kHz on anterior deltoid and sternocleidomastoid (%MVC); NEUTONE TDM-NA1 muscle-hardness tester

Sampling

emg 1000 Hz

License

Data from corresponding author upon reasonable request

Keywords

exoskeleton, shoulder, neck, overhead-work, agriculture, headrest

Added to catalog

2026-09-01

Publications

• Ishii C., Hirasawa K. (2022). The effect of a movable headrest in shoulder assist device for overhead work. Wearable Technol. 3:e25The combined reclining-and-slide headrest was most effective at reducing sternocleidomastoid load.

Exoskeleton

Record type

Device evaluation

Device(s)

Custom shoulder assist device with headrest (Hosei)

Body region

Shoulder, Neck

Actuation

Passive

Study design

Headrest types vs. no headrest vs. no device, static overhead holds and a 10-min simulated fruit-harvesting protocol

Outcomes

Muscle activity (EMG)

This record is part of the exoskeleton collection.

Cite

Cite the dataset as its authors request (check the source page for an official citation); this BibTeX is a convenience starting point.

@misc{ishii-headrest-shoulder-assist,
  author = {Ishii, C. and Hirasawa, K.},
  title  = {{Shoulder Assist Device with Movable Headrest: Overhead Holds and Simulated Harvesting}},
  year   = {2022},
  url    = {https://doi.org/10.1017/wtc.2022.22},
}