The FITLIFE fitness machine smoothly oscillates and triggers a rapid reflexive contraction of your muscles between 25 and 50 times per second. This movements causes your muscles burn large amounts of energy (KJ/Cal),
The FITLIFE fitness machine smoothly oscillates and triggers a rapid reflexive contraction of your muscles between 25 and 50 times per second. This movements causes your muscles burn large amounts of energy (KJ/Cal),