This tool was developed to make it easy to maintain grip strength, based on the causal relationship between decreased grip strength and cardiovascular disease (based on the results of a survey by an international research team led by McMaster University in Canada and a research team from the Ministry of Health, Labor and Welfare).
Gripping it anywhere helps improve blood circulation and muscle strength. Hardness: Medium
Reference grip strength (kg): 10
Color: Green
Material: TPU (thermoplastic polyurethane)
Diameter: Approx. φ85mm
