Patent ID: 7267641

Claim:
A muscle training device comprising: a base seat; a first support arm having a first end connected pivotally to said base seat; an impeding unit having a housing fixed to said first support arm, a piston unit provided in said housing, first and second fluid chambers formed in said housing on two opposite sides of said piston unit, said piston unit includes a pair of pistons which are disposed slidably and respectively in said first and second fluid chambers, a spring disposed within one of said first and second fluid chambers to bias said piston unit, a fluid filled in said first and second fluid chambers, and a passage unit that is in fluid communication with said first and second fluid chambers; a second support arm having a first end connected pivotally to said impeding unit, and turnable toward or away from said first support arm; the impeding unit further includes a worm rod disposed in said housing between said first and second fluid chambers and having two opposite ends connected respectively to said pistons, and a worm gear disposed within said housing and meshing with said worm rod, said worm gear having a pivot shaft, said first end of said second support arm being connected to said pivot shaft; and two supporting cushions connected respectively to said first and second support arms and disposed away from said impeding unit.