A ball-striking implement, in particular a tennis, squash or badminton racket, is described, the implement having a head frame including an impact surface and a stem, which is formed integrally thereon and has a handle, the impact surface being determined by at least one string which is stretched crosswise and forms string portions fastened to the head frame substantially parallel to one another. The method may include, for example, inserting a sensing device into a subject’s body lumen, positioning the subject in a horizontal or other suitable position, and receiving data transmitted from the sensing device. The invention further provides an adjacent channel interference suppression scheme and a modified RRC for better suppressing ACI of RRC OFDM. Each binding includes a shock absorbing midsole and is devoid of any potentially harmful structures that extend above the ankle of a user, such as the molded support behind the heel characteristic of snowboard bindings. 5 and a field of view within the range of 35 to 45 degrees.