Straffr is a smart resistance band that helps you exercise on the go
TechCrunch
SEPTEMBER 21, 2021
Think Peloton ‘s stationary bike for spin classes or wall-mounted strength training rig Tonal. “When you stretch [the Straffr fitness band] the electrical resistance changes and therefore we can say how much you’ve stretched the band for a specific exercise.” And, well, eye-wateringly expensive.)
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