Abstract: An exercise training apparatus attached to a trainee who performs a body exercise training, includes movable bodies, actuators, sensors and a processor. The movable bodies each having a fixed member which a part of a trainee's body is fixed to and exercising a trainee's extremities by rotating around shafts, respectively. The sensors each detecting a physical quantity that changes depending on force applied to the fixed members by a trainee. The processor, in response to a detection of a predetermined change in a physical quantity by the sensors, driving the actuators, rotating the movable bodies in a first direction and successively rotating the movable bodies in a second direction opposite to the first direction.

Abstract: An exercise training apparatus 10 attached to a trainee who performs a body exercise training, includes movable bodies 11, 12, actuators 13, 14, change detecting means 15, 16 and a controlling means 25, the movable bodies 11, 12 having fixed members 11a, 12a which a part of a trainee's body is fixed to and exercising a trainee's extremities by rotating around shafts 19, 22, respectively, the change detecting means 15, 16 each detecting a physical quantity that changes depending on force applied to the fixed members 11a, 12a by a trainee, the controlling means 25, in response to a detection of a predetermined change in a physical quantity by the change detecting means 15, 16, driving the actuators 13, 14, rotating the movable bodies 11, 12 in a first direction and successively rotating the movable bodies 11, 12 in a second direction opposite to the first direction.

Abstract: A polybutadiene rubber having an enhanced mechanical strength is produced in such a manner that the content of water in a solution of 1,3-butadiene in an inert organic solvent is controlled to 0.2 to 5 millemoles per liter of 1,3-butadiene; a first polymerization mixture is prepared from the controlled 1,3-butadiene solution, an organic aluminum compound of the formula Al R.sub.n X.sub.3-n, wherein R=C.sub.1-6 alkyl, phenyl, or cycloalkyl, X=halogen, and n=1.5-2.0, and a cobalt compound, for example, by aging a mixture of the controlled 1,3-butadiene solution with the aluminum compound for at least one minute and then by admixing the aged mixture with the cobalt compound; the first polymerization mixture is subjected to a cis-1,4-polymerization; a second polymerization comprising the resultant cis-1,4-polybutadiene, non-reacted 1,3-butadiene, the inert organic solvent, and a catalyst comprising an organic aluminum compound of the formula AlR.sub.

Abstract: A polybutadiene rubber having an enhanced mechanical strength is produced in such a manner that the contents of water and carbon disulfide in a solution of 1,3-butadiene and carbon disulfide in an inert organic solvent is controlled to 0.2 to 5 m moles and 20 m moles or less, respectively, per liter of the 1,3-butadiene-carbon disulfide solution; a first polymerization mixture is prepared from the controlled 1,3-butadiene-carbon disulfide solution, an organic aluminum compound of the formula Al R.sub.n X.sub.3-n, wherein R=C.sub.1-6 alkyl, phenyl, or cycloalkyl, X=halogen, and n=1.5-2.