The present invention is directed to an exercise and training device for runners and provides a means to train them to stay in the most efficient position for optimum muscle use and to improve speed and lateral quickness. The torque wrench includes a tightening part engageable with an abutment of the implant and a tightening torque detector for detecting tightening torques generated when the abutment is screwed to the fixture. The tissue samples can be stored on flexible tissue sample strips arranged around the circumference of a rotating vacuum manifold disposed within the chamber. Additionally, the techniques are not dependent on the attitude of the mobile device used for indoor navigation relative to the user’s body. The first joinable end is affixed, preferably by welding, to the second joinable end and the first partial finless passage is affixed to a second partial finless passage to form a coupled finless passage, and thereby a heat exchanger core.