TingleTouch: Touch Guidance through Electrical Stimulation in Resistance Training

TingleTouch uses electrical muscle stimulation to recreate a personal trainer's touch guidance during resistance training. In a study with 16 gym-goers, participants distinguished instructional cues with 97–99% accuracy across two sessions.

Problem — a trainer’s touch is hard to replicate alone

In resistance training, trainers use touch to help trainees fix their posture and activate the right muscles. Haptic feedback could bring that support to solitary workouts, but translating the nuance of a trainer’s touch into effective haptic patterns is difficult.

Solution — electrical stimulation patterns for a trainer’s cues

We categorized the instructional messages a trainer conveys through touch and designed electrical stimulation (EMS) patterns to replicate them. A preliminary study with six trainers and six trainees identified six core messages; we designed an EMS pattern for each and refined them with two sports scientists and a UX designer.

Evaluation

Sixteen gym-goers tested the patterns in a controlled exercise task. They reliably distinguished the feedback and engaged the instructed muscles — 97.14% and 99.22% accuracy across two sessions, cross-checked with EMG and pose estimation — showing the feedback is intuitive and learnable.